SOHC.co.uk Forums > CB750
Forks and genernal CB750 K6 rennovation....
scotia_steve:
--- Quote from: Bryanj on November 26, 2008, 04:27:45 PM ---Decent bike Nice car, where are you?
Dave the 500/550 seems more "tolerant" of bad petrol than other models, must be the best to but!!!
--- End quote ---
In Edinburgh. Lot's of nice roads closeby! :)
scotia_steve:
Ok, replaced the head bearings - there is a 1mm difference in height so the forks have to be raised slightly to fit correctly in the top yoke but I figure that cant be too bad... The old races were totally worn out and I needed to use a small blow torch to remove the old race!
Taken the caliper off to paint with heat resistant engine enamel gloss black, painted the top yoke as it was looking a bit sorry for itself and then will rebuild next week!
All this for a fork knock which was most likely the head bearings it seems. Spent the best part of
Bryanj:
Sorry mate, you can't get much farther from Gloucester so i cant pop round to help!
Careful when tightening the fork tube clamps on the top yoke---there is supposed to be a shaped washer in the gap to stop you over tightening and breaking the ally but it regularly goes missing.
scotia_steve:
--- Quote from: Bryanj on November 29, 2008, 01:08:37 PM ---Sorry mate, you can't get much farther from Gloucester so i cant pop round to help!
Careful when tightening the fork tube clamps on the top yoke---there is supposed to be a shaped washer in the gap to stop you over tightening and breaking the ally but it regularly goes missing.
--- End quote ---
I think that's the one that's still there - funny edge to it?
Any idea of torque? This is from a CB550 manual which I believe uses the same fork and stem components....
BigAl (Alan):
I have a CB750 K4 (american) I would agree with the starting problem when left for a couple of weeks. Done all the normal things changed plugs/points re-set timing/balanced carbs/check electrics...the problem is the petrol...if its fresh, its fine by week 3/4 problem starting.
Did some research on line and found interesting articles on www.safety-marine.co.uk on petrol problems in boats/canister storage...the upshot is if there is air in the tank/float bowls and the boat (or bike) moves about frequently the octane of the fuel decreases rapidly, you can buy additives to prevent this, but its easier to put fresh petrol in.
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