1981 CB250 engine needed asap !!

[Warren]

If you want the two bolts that I made then PM me with your addr and I will post them. I swapped the originals back in so only have my custom ones that had to be ground down at both ends to fit.

[Maffoo]

thanks but i rescued one & got a second one (to replace the one that fell out in the first place) from the wreckers where i got the cam

props to Action bike wreckers, barrys pt rd !

i have pics of the job thus far... should i post them here or make a thread somewhere more appropriate?

[xwhatsit]

Ah just post them here -- this can be the gory rebuild thread

Sweet, sounds like you got off lightly then. Sourced a new camshaft? Or was it just the bolt that broke? Valves OK -- didn't hit the pistons?

Get some cheap oil (car oil, doesn't matter) and flush the oil through a few times before starting the engine. I pulled off the side cover to scrape out most of the swarf. When you first fire up the engine, idle the engine for 10 minutes or so in the garage, then do an oil change. Do it again if you like. Then do an oil change within 500kms. I did that and my bottom end seems to have survived.

[Maffoo]

oh lame... it doesnt display images like i was hoping

[Maffoo]

i also need to find the honda workshop manual thats online
damned if i can find it

[Maffoo]

hhaaaaaa i have found the honda common service manual !

woot

[xwhatsit]

I found that Common Service Manual a bit useless. Trying to turn up a CB250N manual, but surprisingly having little luck. Send Magua a PM, I think I might've seen him post about having a manual once.

[Maffoo]

Ok
i have a reoplacement cam
i have oil
i need to know just two things
how to align the cam to the crank & how tight to torque the head down

im gonna ask in the appropriatte forum on here

[xwhatsit]

Aligning the cam to the crank should be easy. You just get the engine at TDC on the compression stroke -- there should be an inspection plug you unscrew that will show you index marks on the flywheel to get there. Usually a `T' mark on the flywheel rim. Then the camshaft, once it's bolted up to the cam sprocket, there will be a pair of index marks on the sprocket as well, or something like that. Align these with the gasket face, and you're all done. Slightly complicated by the fact it's a twin, but they've got index marks for a reason.

I'd troll around for a manual, as that'll be the biggest help. Or go down to your local library and search for the manual -- Haynes or Clymer -- they often have them there. Probably won't be able to borrow it, so just photocopy the appropriate bits.

[Maffoo]

I posteda thread in engine maintenance & got everything i need from magua

im just gonna print it out & go finish it
i have the head sitting on, i got out the piece that went into the engine
also, thankfully because it was a clean break, theres no shit in the engine

i also went out & bought a torque wrench today

[xwhatsit]

Feck you're a lucky bastage

[Maffoo]

ahh i know, but i was due some luck

its finished BTW, about an hour ago
it run... i think i need to reset my exhaust valve clearnaces though,... bit noisy
will take it for a spin later on

thanks for alll your help guys