SOHC.co.uk Forums > CB350/400

Engine rebuild questions

<< < (5/7) > >>

Drew400:
Can't resist adding to this thread, even though I'm adding no value at all....

I tried all sorts to remove my tacho drive oil seal. In the end, I gave up (without seeking advice from this forum - mistake - and without the imagination to try the techniques recommended so far in this thread). In the end, it went to the vapour blasting people still in place. I eventually rebuilt the engine and today, three years later, it still runs fine with the barest trace of an oil leak from the tacho drive!

Gosh these things were built to last (unlike the UK competition at the time, sadly).

Cheers, D.

Clem2112:
Probably on of the fiddliest jobs on the whole bike .... apart from the brake master cylinder rebuild?

It does look like it was designed to stay put for life....so I considered leaving it alone ..... but then I found I could get a new seal from DSS and thought "that £££ing seal will only start dribbling oil at some future date so out out it must come !

My thinking was that the shaft, bush and seal were pressed in so should come out by some means.
Rather than risking damage to the casting I gambled that the shaft should be strong enough along its axis at least to push the bush and seal out.

After a bit fiddling I got the circlip off - using two small screwdrivers I think?
I can remember having stop it trying to turn in the groove as I did this.... took a few attempts too.

Once the circlip ws off there's nothing to keep the shaft and bush in place but the seal I assumed , although that will have been sitting in the cover for years..overnight soak with plus-gas helped.

Used a bigger screwdriver blade wrapped in some tape and wedged it between the end face of the gear and the recess in the cover and "eased" the shaft and bush out complete with the seal. Maybe I got lucky?!

Greg65:
Progress and a temporary stop.

Visited an engine restorers yesterday with the cylinders and head. The bores all measured up well with minimal wear, I even got them deglazed. He cast his eyes across the cam shaft and passed them as fit for continued use and the head was flat. So all round good news, an interesting visit to a professional workshop and some really good tips on the rebuild.

So got stuck in this morning with the intention of getting the case split. All going great until the part which said “use the clutch tool...”. Missed that so now need to order one, oh well looks like I will have to do some decorating instead. :(

Greg65:
Finally found time to continue the engine strip. A very satisfying moment when I got my hands on the cam chain tensioner, this being the suspect area that has lead me to strip the engine. At some time the chain has come into contact with the horse shoe at the pivot point. This has burred over the bracket and pinched the horseshoe preventing any further movement. After applying pressure it freed up and a careful clean with a needle file it’s free and functional. The only other area for concern is the drum stopper plate which shows considerable wear. I can find no obvious cause for it but would appreciate advice.

Thanks,
Greg

Nurse Julie:
That looks OK to me Greg by what I can see in the pic. They do have one very 'flat' pointed side, if you get my drift.
Edit
This is what they look like new Greg



[ Guests cannot view attachments ]

Navigation

[0] Message Index

[#] Next page

[*] Previous page