SOHC.co.uk Forums > Project Board
Honda CB750K5 Restoration by Royhall
K2-K6:
I'd bet my Ulez money / fine / scam funds on it being tge idke jet Roy.
The Boyer does a funny thing sometimes if there's a missed fire point, and may give that pop back through the inlet valve as it can fire it off at prior tge bdc with some charge in the cylinder and inlet open. Not a fault of the ignition, but shows other compromise in place.
That #1 pipe cooler than #4 is a giveaway I believe. If you run them down the road it heats them all from running on mains, which kinda masks the original cause.
Could try just blowing into #1 breather while its running to see if forcing a little fuel, via pressure in float bowl, in there will stop it popping temporarily.
royhall:
Now the pipes have cooled but the engine still warm, I started it up and exhaust 1 is warming slower than the others. My money is on the blocked idle jet as well. As there's also something weird going on with the choke (like no fast running) I am thinking of taking the carbs off again and sending them to my usual carb guy Matt Harper. I don't think Gerben has done a very good job with these, wont be the first time he has sent me carbs with blocked jets. It will cost more money but at least they will come back bob on.
Before then I would like to solve the charging issue, where's the best place to start.
K2-K6:
There's no throttle lift on these for choke use at all Roy.
Unlike the F2 and some of the smaller fours, you're on your own for manual throttle modulation when using choke flaps.
K2-K6:
Charging, first stop is the plugs coming out of generating pack in around the front sprocket cover to make sure there's nothing amiss there.
royhall:
If I disconnect the three yellows in the chain case, is it safe to run the engine and meter the output on each yellow.
I was wondering about the throttle control on the choke, thanks for verifying that, am used to the 350F and the 750F2.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version