SOHC.co.uk Forums > CB750
Poor running
Lobo:
Fordy,
This thread any use...?
You'll have to scroll down before it gets onto needles etc
http://forums.sohc4.net/index.php/topic,114960.0.html?PHPSESSID=s38h0m3sbn7e2uqcpa1cofnhp1
Simon
Fordy:
Thanks for that Simon, interesting reading, I also couldn't detect any wear on the needles or the seats but replaced them anyway. Hasn't made any difference at all.
Don't know which way to go now cos I put the new ignition plate bits in and it's just as bad. :o
Don't get this problem with my old-old stuff cos only got 2 carbs max. Haha.
MarkCR750:
I had a ZXR400 a couple of years ago, non standard filter and exhaust fitted, it ran ok for about 2 miles and then would bog down and not want to rev until eventually it would almost cut out, let it cool to stone cold and it would run fine until warm, sooty plugs etc, I tried lots of things before deciding to go away from the standard float height settings, if I remember correctly they should have been 13mm, I took them to 15mm and it ran better, set them to 16 or17mm and it ran perfectly, plugs a really nice colour and no flat spots, could be worth a bit of trial and error on your float heights?.
(Here's the ZXR wish I still had it, 14.5k redline, what a little screamer it was! :))
Lobo:
Fordy....stabbing at straws admittedly, but have you got the correct (heat range) plugs in (D8-ES). If too cold they may be fouling up / playing havoc with your spark?
Your exhaust still the Motad? If so, perhaps Ian McDonald of Motad might be able to help? His contact # within this thread...
http://www.sohc.co.uk/index.php/topic,7443.msg45133.html#msg45133
Simon
Navigation
[0] Message Index
[*] Previous page
Go to full version