Hi ok there lots of this stuff around but I'm getting a weird test result when I'm checking for a suspect Vacuum leak.
'89 750 btw c/w - BST36's
Ok so Just rebuilt carbs new slide guides standard jetting one float not right ok set that.
Now take her for a ride and revs hanging on off throttle, not able to set idle properly misses on low speed accel, stalls.
Ok sounds like a vacuum leak can sort that had a bit of trouble lining up all the old boots........... could be.
Get propane bottle and hose run let the bike warm up and only once did it look like the revs rose but that was nearer the throttle linkage, couldn't get it to do it again however every time I stuck the hose near here the revs died
and if left there would stall the bike
tried and tried again same result revs die take away and back up to idle she went. so I'm a bit confused by this cause by all accounts a vacuum leak and propane the revs should go up .
Hmm tried it again and maybe more noticeable around the choke slide but nothing if I sprayed it with wd40,
If I put some pressure on the Choke plunger it also dies so wondering if the plunger can get worn to the point of causing this problem?????
I wouldn't think that was right either if it's drawing air in should rise in revs???????
Any body got some ideas before i strip it down before I tried the same with WD40 but couldn't get it to do anything
Before we go too far all I changed was the slide guides, needles emulsion tubes and Mains (up one from 102.5 to 105) I've added a 4-2-1 so trying out the jetting.
All pilots and other settings are exact like before and had no problems at low engine speeds before.
Actually had the opposite problem with the worn slides too rich and missing at WOT........
'89 750 btw c/w - BST36's
Ok so Just rebuilt carbs new slide guides standard jetting one float not right ok set that.
Now take her for a ride and revs hanging on off throttle, not able to set idle properly misses on low speed accel, stalls.
Ok sounds like a vacuum leak can sort that had a bit of trouble lining up all the old boots........... could be.
Get propane bottle and hose run let the bike warm up and only once did it look like the revs rose but that was nearer the throttle linkage, couldn't get it to do it again however every time I stuck the hose near here the revs died
and if left there would stall the bike
tried and tried again same result revs die take away and back up to idle she went. so I'm a bit confused by this cause by all accounts a vacuum leak and propane the revs should go up .
Hmm tried it again and maybe more noticeable around the choke slide but nothing if I sprayed it with wd40,
If I put some pressure on the Choke plunger it also dies so wondering if the plunger can get worn to the point of causing this problem?????
I wouldn't think that was right either if it's drawing air in should rise in revs???????
Any body got some ideas before i strip it down before I tried the same with WD40 but couldn't get it to do anything
Before we go too far all I changed was the slide guides, needles emulsion tubes and Mains (up one from 102.5 to 105) I've added a 4-2-1 so trying out the jetting.
All pilots and other settings are exact like before and had no problems at low engine speeds before.
Actually had the opposite problem with the worn slides too rich and missing at WOT........
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