SOHC.co.uk Forums > CB500/550

It won't start!

<< < (3/4) > >>

Bryanj:
Never tried doing the kickstart through the sump, but then never had one go bad either, always took it that as the little circlip was a swine to fit with lots of space it would be even worse keyhole style.
Found out years ago that less than 140 wasnt good, on a C70 of all things---it made 115 with a shot exhaust valve but was a swine to start and had no reliable tickover, new valve 165 compression ran perfect.
Do know the pilots block for a pastime with modern petrol and standing
If you put easystart up the exhaust and it coughed are you running it backwards???

SteveD CB500K0:

--- Quote from: Bryanj on March 22, 2008, 12:31:52 PM ---If you put easystart up the exhaust and it coughed are you running it backwards???

--- End quote ---

Is it possible to run a 4 stroke backwards?

matthewmosse:
If a camshaft was wrong then it would be possibe but it means the exhaust and inlet cams are back to front? can this be done with a dodgy rocker box reassembly? or odd camshaft? any probability of a racing camshaft having radically altered timing? or of one twisting? I'll pull it appart when the bathroom is done(ish) and compare the various components with ones out of a runner just out of interest. I'll post my findings just out of interest. Blocked jets could be to blame for hard to start if it wern't for the clouds of fuel blowing into the airbox which created a mini fireball. One of the reasons I'm not willing to play for a while......... I'll just have to carry on using my good lady's bike until the parts arrive to indulge in my guilty secret, a kh125 2 stroke that kick started my biking career in my 'L' plate days and has been sat in the shed with a holed piston for years til I forked out the

Bryanj:
Yes Steve it is---as any old trucker WITH A T about Gadiner diesels----Greta fun when the cab fills with exhaust smoke and the governor dont work cos its running backwards!!

matthewmosse:
Hi, thought I'd doo an update before heading back to my cold, damp shed :'(
Thanks to florence for the suggestion of a brass rod down the plug hole it solved at least one (bloody obvious when you think about it) problem. Doh! The advance retard mechanism looked perfectly normal, functioned fine etc. BUT when removed and closely compared to a spare it turned out to be a rouge one from godknowswhere. looked identical appart from the peg in the back is about 120 degrees out. No idea what it should be on as I've no other 4 cylinder bikes so I binned it. Just got to heliciol 3 rocker cover screws and put it back together, fingers crossed it will work!
Geuss the cam timing wasn't wrong in the first place after all! Doh!!!!!!! :-[
Thanks All for the advice!!

Navigation

[0] Message Index

[#] Next page

[*] Previous page