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ISR Front Brake & Clutch Master Cylinders

ISR Radial Front Brake/Clutch Master Cylinder (Remote Reservoir) with Adjustable Ratio & Lever Span

ISR Radial Front Brake/Clutch Master Cylinder (Remote Reservoir) with Adjustable Ratio & Lever Span

Ref: SIZ41906

These radial master cylinders from ISR really are a work of art! Machined from billet aluminium and incorporating many unique design features, these work as good as they look.

The adjustable lever ratio means that you can tailor the feel of your front brakes exactly to suit your preference. The ingenious design means that these can be used as either a front brake or clutch master cylinder - simply un-bolt the lever assembly and spin round to suit - and in a race crash damage situation this can also mean that the lever assembly can often be replaced without disconnecting the brake line or bleeding the cylinder.

- Adjustable leverage ratio
- Span/reach adjustable lever with comfortable profile
- Integral nipple for rapid bleeding after assembly/servicing
- Clear anodised, corrosion resistant finish
- Can be configured as a brake or clutch master cylinder
- Uses same lever as Cable Clutch
- Ready to connect to your bike's standard/original remote fluid reservoir (except Brembo O.E.M. as used on Aprilia & Ducati)

Can be supplied with optional single or double brake line banjo bolt and washers - with integral hydraulic brake light switch for road/street bikes (please select below).

Please also select your required bore size:
- 15.87 mm for bikes with twin 4 piston radial front calipers, or a single 4 piston front caliper
- 17.50 mm for bikes with twin 6 piston caliper, or older-style non-radial 4 piston front calipers

If you are building a special or simply want to clean up your handlebars, we have the unique range of ISR electrical switchgear - which very neatly bolts on to the back of your master cylinder (and/or cable clutch) replacing the original 4-bolt clamp, taking up less space. See full range of switches listed below on this page.


Click here for a larger image...


Click here for more information on ISR...



Please select Bore Size...


Add Single Banjo Bolt - without Brake Light Switch 3.72 inc. VAT
Add Double Banjo Bolt - without Brake Light Switch 4.44 inc. VAT

Price:435.60 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



Read the ISR Radial Front Brake/Clutch Master Cylinder (Remote Reservoir) with Adjustable Ratio & Lever Span Reviews...
(Overall Rating: 10 out of 10)

Superb quality
It was a pleasant surprise to receive the ISR components so quickly. The parts all look to be superb quality. Thanks for all your help on this.
Baz - Harley XR1200 Street Scrambler


ISR Radial Front Brake/Clutch Master Cylinder (Integral Reservoir) with Adjustable Ratio & Lever Span

ISR Radial Front Brake/Clutch Master Cylinder (Integral Reservoir) with Adjustable Ratio & Lever Span

Ref: SIZ44837

These radial master cylinders from ISR really are a work of art! Machined from billet aluminium and incorporating many unique design features, these work as good as they look.

The adjustable lever ratio means that you can tailor the feel of your front brakes exactly to suit your preference.

- Adjustable leverage ratio
- Span/reach adjustable lever with comfortable profile
- Integral nipple for rapid bleeding after assembly/servicing
- Clear anodised, corrosion resistant finish
- Uses same lever as Cable Clutch

Can be supplied with optional single or double brake line banjo bolt and washers - with integral hydraulic brake light switch for road/street bikes (please select below).

Please also select your required bore size:
- 15.87 mm for bikes with twin 4 piston radial front calipers, or a single 4 piston front caliper
- 17.50 mm for bikes with twin 6 piston caliper, or older-style non-radial 4 piston front calipers

If you are building a special or simply want to clean up your handlebars, we have the unique range of ISR electrical switchgear - which very neatly bolts on to the back of your master cylinder (and/or cable clutch) replacing the original 4-bolt clamp, taking up less space. See full range of switches listed below on this page.


Click here for a larger image...


Click here for more information on ISR...



Please select Bore Size...


Choose Brake or Clutch...


Add Single Banjo Bolt - without Brake Light Switch 3.72 inc. VAT
Add Double Banjo Bolt - without Brake Light Switch 4.44 inc. VAT

Price:435.60 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Front Brake Master Cylinder with Adjustable Lever Span (Integral Reservoir)

ISR Front Brake Master Cylinder with Adjustable Lever Span (Integral Reservoir)

Ref: SIZ57060

These non-radial master cylinders from ISR are an ideal upgrade for retro or custom bikes. Machined from billet aluminium and incorporating many unique design features, these work as good as they look.

The adjustable leverage feature means that you can tailor the feel of your front brakes to suit your preference.

- Adjustable leverage
- Span/reach adjustable lever with comfortable profile
- Clear anodised, corrosion resistant finish
- Uses same lever as Cable Clutch

Can be supplied with optional single or double brake line banjo bolt and washers - with integral hydraulic brake light switch for road/street bikes (please select below).

Available in two bore sizes:

  • 14.00 mm for bikes with twin two piston front calipers, or a single 2 or 4 piston front caliper
  • 17.50 mm for bikes with twin 4 or 6 piston calipers

If you are building a special or simply want to clean up your handlebars, we have the unique range of ISR electrical switchgear - which very neatly bolts on to the back of your master cylinder (and/or cable clutch) replacing the original 4-bolt clamp, taking up less space. See full range of switches listed below on this page.


Click here for a larger image...


Click here for more information on ISR...

Add Double Banjo Bolt - without Brake Light Switch 5.18 inc. VAT


Select your handlebar diameter....


Please select Bore Size required...


Add Single Banjo Bolt - without Brake Light Switch 4.44 inc. VAT

Price:322.21 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Universal Cable Clutch Lever & Assembly (Adjustable Lever Span)

ISR Universal Cable Clutch Lever & Assembly (Adjustable Lever Span)

Ref: 41907

For those who fit an ISR Brake Master Cylinder and want a matching cable clutch lever unit or for those who simply need to adjust the span of their cable clutch lever - this is THE product.

- Takes standard 3.5mm clutch cables
- Adjustable lever reach
- Linear cable travel/pull 12mm
- Clear anodised, corrosion resistant finish
- 275g - complete
- Matches ISR hydraulic master cylinders and uses same levers

If you are building a special or simply want to clean up your handlebars, we have the unique range of ISR electrical switchgear - which very neatly bolts on to the back of your cable clutch (and/or master cylinder) replacing the original 4-bolt clamp, taking up less space. See full range of switches listed below on this page.


Click here for a larger image...


Click here for more information...

Price:158.14 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Remote Racing Rear Master Cylinder (14mm)

ISR Remote Racing Rear Master Cylinder (14mm)

Ref: 46309

Weighing in at only 420 Grammes and machined from billet aluminium, this master cylinder is suitable for both road and racing bikes.

The 14mm bore suits the twin piston fixed or large single piston floating rear calipers found on virtually all motorcycles.

Its neat sealed remote reservoir is designed to be easily replaced if damaged in a crash - it also looks trick as well!


Click here for a larger image...


Price:161.44 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR 22mm Billet Switch Assembly 1 Push Button

ISR 22mm Billet Switch Assembly 1 Push Button

Ref: 51486

ISR have created a number of handlebar clamp switch assemblies. These fit any of the ISR master cylinder or clutch levers and can be wired to your custom functions.



Click here for another image...


Price:54.25 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR 22mm Billet Switch Assembly 1 Slide/1 Push Button

ISR 22mm Billet Switch Assembly 1 Slide/1 Push Button

Ref: 45781

ISR have created a number of handlebar clamp switch assemblies. These fit any of the ISR master cylinder or clutch levers and can be wired to your custom functions.

Also available:
1 slide and 2 push buttons (left and right hand) - call for details,
OR... 2 push buttons only (see below).


Click here for a larger image...


Price:82.50 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Billet Switch Assembly 2 Push Buttons

ISR Billet Switch Assembly 2 Push Buttons

Ref: SIZ51750

ISR have created a number of handlebar clamp switch assemblies. These fit any of the ISR master cylinder or clutch levers and can be wired to your custom functions.

This version features 2 push buttons.

Available for 22mm or 25.4mm bars.


Click here for a larger image...



Choose your handlebar diameter....


Price:100.19 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Billet Switch Assembly 1 Slide and 2 Push Buttons

ISR Billet Switch Assembly 1 Slide and 2 Push Buttons

Ref: SID57015

ISR have created a number of handlebar clamp switch assemblies. These fit any of the ISR master cylinder or clutch levers and can be wired to your custom functions.

This version features 1 Sliding Switch and 2 push buttons.

Available for 22mm or 25.4mm bars.

Please note: 2 switches are pictured to illustrate the difference between left and right sided, only one switch will be supplied.



Click here for a larger image...


Choose Left or Right Handed Switch...




Choose your handlebar diameter....


Price:100.19 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Type 2 Billet Switch/Clamp Assembly 2 Push Buttons

ISR Type 2 Billet Switch/Clamp Assembly 2 Push Buttons

Ref: SIZ58124

To enable you to put the perfect finishing touches to your special - or simply clean up your handlebars and save space - we have a number of very neat and functional handlebar Clamp Switch Assemblies. These fit any of the ISR master cylinder or clutch levers (including the Cable Clutch) and can be wired to your preferred functions.

This version features 1 push button - which could be used for Starter or Horn, etc. - and is suitable for both left or right hand fitments. Max. Current is 25mA for Push Buttons, meaning relays may be required for some applcations.

Available for 22mm (7/8") or 25.4 mm (1") bars - please choose below when ordering.




Choose your handlebar diameter....


Price:67.19 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Type 2 Billet Switch/Clamp Assembly 1 Push Button

ISR Type 2 Billet Switch/Clamp Assembly 1 Push Button

Ref: SIZ58119

To enable you to put the perfect finishing touches to your special - or simply clean up your handlebars and save space - we have a number of very neat and functional handlebar Clamp Switch Assemblies. These fit any of the ISR master cylinder or clutch levers (including the Cable Clutch) and can be wired to your preferred functions.

This version features 1 push button - which could be used for Starter or Horn, etc. - and is suitable for both left or right hand fitments. Max. Current is 25mA for Push Buttons, meaning relays may be required for some applcations.

Available for 22mm (7/8") or 25.4 mm (1") bars - please choose below when ordering.




Choose your handlebar diameter....


Price:61.25 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Type 2 Billet Switch/Clamp Assembly 1 Indicator 2 Push Buttons

ISR Type 2 Billet Switch/Clamp Assembly 1 Indicator 2 Push Buttons

Ref: SIZ58147

To enable you to put the perfect finishing touches to your special - or simply clean up your handlebars and save space - we have a number of very neat and functional handlebar Clamp Switch Assemblies. These fit any of the ISR master cylinder or clutch levers (including the Cable Clutch) and can be wired to your preferred functions.

This version features one on-off-on Rocker Switch and two Push Buttons - which could be used for Indicators, Starter or Horn, etc. - and is available in 22mm (7/8"), 25.4mm (1") versions and left and right handed fitments. Max. Current for Rocker Switches is 6A and 25mA for Push Buttons, meaning relays may be required for some applcations.




Choose Left or Right Handed fitment and handlebar diameter....


Price:100.19 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



Read the ISR Type 2 Billet Switch/Clamp Assembly 1 Indicator 2 Push Buttons Reviews...
(Overall Rating: 10 out of 10)

Very Happy...
Received ISR parts today, very happy with them, cheers.
Barry - Suzuki GSXR 1216


ISR Type 2 Billet Switch/Clamp Assembly 1 Indicator  1 Push Button

ISR Type 2 Billet Switch/Clamp Assembly 1 Indicator 1 Push Button

Ref: SIZ58149

To enable you to put the perfect finishing touches to your special - or simply clean up your handlebars and save space - we have a number of very neat and functional handlebar Clamp Switch Assemblies. These fit any of the ISR master cylinder or clutch levers (including the Cable Clutch) and can be wired to your preferred functions.

This version features one On-Off-On Rocker Switch and one Push Button (Two Button Version Shown Here) - which could be used for Indicator, Starter or Horn, etc. - and is suitable for both left or right hand fitments. Max. Current for Rocker Switches is 6A and 25mA for Push Buttons, meaning relays may be required for some applcations.

Available for 22mm (7/8") or 25.4 mm (1") bars - please choose below when ordering.



Click here for a larger image...



Choose your handlebar diameter....


Price:82.50 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Type 2 Billet Switch/Clamp Assembly 1 On-Off Rocker

ISR Type 2 Billet Switch/Clamp Assembly 1 On-Off Rocker

Ref: SIZ58126

To enable you to put the perfect finishing touches to your special - or simply clean up your handlebars and save space - we have a number of very neat and functional handlebar Clamp Switch Assemblies. These fit any of the ISR master cylinder or clutch levers (including the Cable Clutch) and can be wired to your preferred functions.

This version features one On-Off Rocker Switch - which could be used for Lights on-off or Main Beam etc. - and is suitable for both left or right hand fitments. Max. Current for Rocker Switches is 6A meaning relays may be required for some applcations.

Available for 22mm (7/8") or 25.4 mm (1") bars - please choose below when ordering.




Choose your handlebar diameter....


Price:67.19 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Type 2 Billet Switch/Clamp Assembly 1 On-Off Rocker  2 Push Buttons

ISR Type 2 Billet Switch/Clamp Assembly 1 On-Off Rocker 2 Push Buttons

Ref: SIZ58122

To enable you to put the perfect finishing touches to your special - or simply clean up your handlebars and save space - we have a number of very neat and functional handlebar Clamp Switch Assemblies. These fit any of the ISR master cylinder or clutch levers (including the Cable Clutch) and can be wired to your preferred functions.

This version features one on-off Rocker Switch and two Push Buttons - which could be used for Indicators, Starter or Horn, etc. - and is available in 22mm (7/8"), 25.4mm (1") versions and left and right handed fitments. Max. Current for Rocker Switches is 6A and 25mA for Push Buttons, meaning relays may be required for some applcations.




Choose Left or Right Handed fitment and handlebar diameter....


Price:100.19 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Mirror Mount Clamp

ISR Mirror Mount Clamp

Ref: ISRMIRR

Mirror Mount made from billet Aluminium to compliment your existing ISR products.

Simply replaces the existing clamp on your ISR Master Cylinder.

Available to suit 22mm or 25.4mm diameter handlebars.


Click here for a larger image...



Choose your handlebar diameter....


Price:31.91 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



Read the ISR Mirror Mount Clamp Reviews...
(Overall Rating: 10 out of 10)

Very Happy...
Received ISR parts today, very happy with them, cheers.
Barry - Suzuki GSXR 1216


ISR Piston Removal Tool for 32, 42 & 44mm Caliper Pistons

ISR Piston Removal Tool for 32, 42 & 44mm Caliper Pistons

Ref: 57136


Made from billet Aluminium.






Price:64.46 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)



ISR Spare Adjustable Brake/Clutch Lever Blade

ISR Spare Adjustable Brake/Clutch Lever Blade

Ref: 42820


Made from billet Aluminium.

Replacement blade section (up to the knurled span adjuster) for ISR radial brake/clutch master cylinders.





Click here for a larger image...


Price:47.52 (Including VAT at 20%)








(Optional delivery charges calculated before checkout, depending on destination & service)