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Front brake service / set up 400/4 advice please
Rozabikes Tim:
Just getting my 400 up and running for pre resto check for any gremlins.
Motor running suprisingly well bar some primary chain and camchain noise. Dare not ride it far as front brake useless even by sohc standards! I know this is well covered on the forum but can't easily find relevant posts. Can someone point me to best post or just advise from experience.
Tim
Nurse Julie:
All I can tell you is that it has a floating caliper, and mine needs adjusting every 50 miles or so due to squeeking on braking. New pads fitted about 5k ago. Not the worse bike I have ever owned for braking, that was an old 750 Bonneville. With the CB400/4 just pull the lever in on Tuesday if you want to come to a halt on Saturday at 3pm ;D ;D
mike the bike:
Make sure the pads are free to move, likewise the caliper pivot. Grease the pivot with Copaslip or something similar. Bleed the brake. Fitting Stainless brake hoses makes a difference. Use PTFE tape on the bleed nipple threads so it doesn't seize.
Rozabikes Tim:
Surprisingly pivot arm moving great, piston side of caliper really stiff. On stripping, pad corroded on back plate sides / ditto in front of caliper round contact area with it. Piston pitted so either replace now or clean up and see, then do proper job on resto. From what I read, new pistom from DS and genuine Hionda seal. I know copaslip can be used on pins etc on more modern and car calipers. Is a smear of this ok or a no no on sides of pad back plate?
kent400:
All good advice here, I too wasn't too happy with the front brake performance and genuine Honda brake
pads improved performance. Keeping the disc clean with a frequent clean with brake cleaner spray also seems to help. The corrosion on the piston to caused by moisture within the brake fluid so it does need to be changed every three years or so. Alternatively change to silicone brake fluid which does not absorb moisture and before anyone says it's not compatible with the various seals after 15 years of using it following master cylinder/calliper rebuild all is fine. Still on the original hoses. Also it won't damage paint and we all know what a mess can be made when bleeding the front brake.
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