well it will start but I need to hold a very partial throttle with choke on a fair bit to get it to stay running but it does eventually die. doesnt matter how I work the choke or throttle it just wont clear itself & rev at all. Super compression, super sparks, & clean fuel going straight to carbs(clear pipe so I can see it getting sucked into them). The carbs are clean had the bowls off & checked the jets etc , one thing I didnt check was the diaphrams, could that be likely? the carbs are some kind of slide oval things but think I might try normal 1wg ones.



Any ideas chaps

mines the other way round dont want to start when warm

yours could be a bit lean poss?, maybe some carb cleaner thru them might help clean up any partially blocked jets, needles, wouldnt do any harm!



We,ll get there lol!!!!

Check your valve clearances.

It's a common problem we get at the shop, and 8/10 times if the carbs are ok its that the valves have 0 clearance left.

I done a compression check, all nearabouts 140 150 psi!

hipringle wrote:I done a compression check, all nearabouts 140 150 psi!

Nice !!!

So sounds like carbs then ... obviously have a look at the diaphrams.
Have you tried this with airbox off and then on ? that will lean / rich the mixture enough to maybe give a pointer to the problem if it's just mixture.
It could be emusion tubes - they can give alsorts of wierd running
Try disconnecting the exup cables and see if that helps

what you mean by this im lost im a truck mechanic
(the carbs are some kind of slide oval things)

Evilchicken0 wrote:

hipringle wrote:I done a compression check, all nearabouts 140 150 psi!

Nice !!!

So sounds like carbs then ... obviously have a look at the diaphrams.
Have you tried this with airbox off and then on ? that will lean / rich the mixture enough to maybe give a pointer to the problem if it's just mixture.
It could be emusion tubes - they can give alsorts of wierd running
Try disconnecting the exup cables and see if that helps

Bout time too
Tried airbox on & off & hand over carbs as well lol, never looked at emulsion tubes tho so tommorow I,ll whip them off & take the tops off first.

I,ll disconnect the exup too just in case, again your input is reassuring I really hope you dont go all vfr on us......

Pastures, loose the 3/4 inch drive sockets & buy a sweet 1/4 drive lol, the carbs I fink are different to normal cv ones, slide carbs (I think), used more in racing but I know very little tbh. (to be honest )

As soon as I,m finished window cleaning tommorow I,ll be down the garage

3/4 inch drive sockets dont think so im a big boy 1 inch all the way


been over 20yrs since i had my last bike kwacka z650 its so different to work on now

emulsion tubes

lol, my bad yes, any respecting hgv maniac would be 1" drive.


me fatha is a fitter down the ship repair yards due to retire dec this yearr, in fact hes the last fitter left or one of the last still working on the tyne there since being made an apprentice millions of years ago, all the yards shut down, I had a couple of years labouring for fitters & used spanners the weight of me on ships engines knocking them with 28lb hammers, them were the days.........