SOHC.co.uk Forums > CB750

First question of many: Wheels & Brakes

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K2-K6:
What people don't usually take into account is that these bikes can be someting like 70Kgs heavier than modern stuff which has a big influence on stopping.

In short they just can't be stopped as quick as a lighter bike whatever brakes you put on them, the std F2 with some mods as Pete says are not a bad setup. You should make sure that the fluid is in good condition as part of any planned improvement.

With the all up weight and fairly skinny fork legs you reach a practical limit.

Unless you go down in rim diameter (will also change geometry and handling) you may find a limited range of tyre widths for the front end.

Modern tyres seem to have more grip during breaking than original types anyway so should have brought an improvement anyway.

A change in mastercylinder to a different size would influence the feel to you more.

alexjb666:
Thanks for all the replies guys. I am thinking a wider rim (if possible) may ease my uneasiness and provide that little bit more traction i am looking for when stopping as some times the wheels have stopped before I have. I know this is also due to me not yet being used to the pressure required on the pedal so it isnt all the bike.

Alex

K2-K6:
You've got something of the feeling in the last post in that the feel is very different from modern lighter bikes in that with say a good new 600 when you hit the brakes hard you get quite a bit of dive at the front but the forks support it well and still give reasonable feel to you of what the tyre is doing.

Practical limit coming as the back comes off the floor and the bike still turns well.

With a longer/heavier older bike, the forks don't support such a hard hit and end up very close to fully compressed and lose more feel of what the tyre is doing. Also they tend to just push the front along when locked rather than you getting more warning of what's happening.

Rozabikes Tim:

--- Quote from: alexjb666 on February 05, 2012, 11:46:12 PM ---Thanks for all the replies guys. I am thinking a wider rim (if possible) may ease my uneasiness and provide that little bit more traction i am looking for when stopping as some times the wheels have stopped before I have. I know this is also due to me not yet being used to the pressure required on the pedal so it isnt all the bike.

Alex

--- End quote ---

If you are new to the world of these beasts, worry not they do stop with enough effort.

I raced and did many track days on my tuned CB900 on similar if not the same brakes / wheels to the F2. Never locked a front wheel (rear yes) with some serious braking efforts.

If you are used to more modern stuff, this will seem so slow and lethargic with no doubt. However you will find you develop have a different attitude, enjoying the bike for other reasons. I'm building (eventually) a cafe racer from my F2 for the enjoyment and just to look at it. Any riding will be chilled.

alexjb666:
Dont ride modern sport bikes to he honest. Up until i got the 750 i rode purely cruisers. I just feel the rear loses traction rather quickly under braking so was looking for any improvements. Looking forward to her being done for afternoon cruises round town or trips to work i actually look forward to!

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