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Well as some of you may know from reading previous threads i have had the engine out and back in agai with the head gasket now done. At first she atarted fine and was a bit naff below 4k and then fine up until 8k revs. Then very hesitant then took of again. Also had the problem of hanging. Though would sometimes hang some times not (poss air leak)

I rechecked the balancing and found that to be off. So i re balanced the carbs at 2k revs, and adjusted the mixture. Flat spot gone, was great above 4k all the way, but idle was pants and still hanging. Adjusted the mixture more, and can't seem to get rid of the hanging (though again this is temperamental). So i have put the mixture back to roughly standard.

So here i am with a bike that runs great above 4k revs. Pulls cleanly all the way, really taking off at 8-10 as usual. Whack the throttle open, no hesitancy. But below 4k especially when pulling away, it is pants. If you open the throttle fully, she really bogs down, gentle seems better, though that may be my imagination. Its as though the fueling is completely off, though as i say, whack it open, bogs down and very hesitant, get to 4k and its absolutely fine!!
So what do people think is wrong?

I think if you open the throttle quickly and it bogs, isnt that a sign of being too rich?

At this point i sit back and say 'try a shot of redex and see how it goes'.

and just to add, there was apparently a blue flame exhaust on before, now its back to standard, though i am told the jetting wasn't altered before. And if too rich why would that only bog down up to 4k revs?
Only other thing changed when doing the HG was the reg/rect though i can't see how this would affect things. Though the bike didn't have this problem before doing the HG

parby81 wrote:and just to add, there was apparently a blue flame exhaust on before, now its back to standard, though i am told the jetting wasn't altered before. And if too rich why would that only bog down up to 4k revs?
Only other thing changed when doing the HG was the reg/rect though i can't see how this would affect things. Though the bike didn't have this problem before doing the HG

O Bugger i changed my reg/rec yesterday and now mines doin the same!

but you have adjusted the mixture settings. How long have the carbs been sat while doing the HG?

well let me see......hmmm...... overnight!!! can't tell me the fuel has gummed them up overnight!!! i just wont believe you

any excuse to sell some redex!

O Bugger i changed my reg/rec yesterday and now mines doin the same!

Well isn't that funny now!! I might stick the old one back on tomorrow and see if that makes any difference. Though then i'm back to the charging problems Can anyone point me in the direction of the test you can do to check a reg/rect?

what charging problems? thats why i changed mine

well to be honest it wasn't really a chargin problem. I was riding back round the M(crawl)25 in heavy traffic so had my full beam on (new battery by the way, properly charged) when coming off the m25, went to indicate and my mate behind said the light was dim and just stayed on. Coming up to the lights at the bottom of the slip, pull in the clutch and it dies. Have to bump start as battery is dead. Ride home from there with the lights off, get home and it starts on the button. Ride everywhere with my lights on (not full beam though) and haven't had the problem again since changing the reg/rect. hmmmm

parby81 wrote:well let me see......hmmm...... overnight!!! can't tell me the fuel has gummed them up overnight!!! i just wont believe you

lol, well thats that safely eliminated then!

Damn, this credit crunch aint doing any good for my shares!

O Bugger i changed my reg/rec yesterday and now mines doin the same!

when you say its doing the same, what are the symptons exactly?

'try a shot of redex and see how it goes'
Damn, this credit crunch aint doing any good for my shares!

I can't find the little one shot pots anywhere. Admittedly i only tend to go in shell garages, but none of my local ones have it in!

had the same problems mate with the lights, have had to use the bike for a week and half with no lights, changed rge reg/rec and now it starts and the battery doesn;t drain if i put the lights on.same symptoms running wise, under 4k toad, around 6-7k crap then flies.it ran fine with the old reg/rec.

well that is very bizarre. Was the new reg/rect new or 2nd hand new? mine was a 2nd hand new. Seems odd we are both having the same probs having both fitted a new one. why should this affect the running though, particularly below 4k revs?

it was off an L9 so yeah 2nd hand new and it shouldn't affect the way the bike runs!