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Here we go again, my 1500 is stumbling badly coming off idle. But this time it's different.
After a good friend in the GWOCB breathed on it, almost all of my problems had gone. The only real issue being that, as you settled down to a cruising speed the bike would "cut" for a split second - almost like it lost all it's sparks and then come back. After that she would cruise and give me at least 140 miles to the tank. Bear in mind I kept well away from the empty end of the scale as the low fuel light has never worked.
Then things changed. The revs on idle dropped a bit but it was still steady. When you rev it sounds like (and is) running on three (Right bank). After 2000 - 2500 rpm the left bank cuts in, the bike kicks you up the backside and you're off! Not safe.
I know she is idling on the right three by the simple test of pulling off the left three plug caps while she is idling - no change. Pull just one of the right plug caps (Any one) and she dies.
With just one of the left three plugcaps off the bike will not rev so I know they are all firing.
Having taken it to the local meet, it was pointed out that there is a smell of unburnt fuel on the left side on idle so perhaps it may be ignition. The carbs have been out countless times, tubes changed, carbs balanced. I've even reversed the gauges in case they were reading wrong. The gauges being Davida so they're reasonable.
I should also say I've measured the ignition coils and pulse generator resistances and they check with the manual. I've also changed the ignition coils simply because I had a spare set.
The good friend mentioned above is lending me a set of pulse generator coils to try even though he still thinks it's a fuel problem. I have three questions for here;
1. Any thoughts?
2. Can anyone in the UK lend me an ECU? All postage costs will be met and ECU returned without argument should not not wish to sell if it fixes the problem.
3. Can the TW sensor be checked without removing it?
Now, where's that wall?
Here we go again, my 1500 is stumbling badly coming off idle. But this time it's different.
After a good friend in the GWOCB breathed on it, almost all of my problems had gone. The only real issue being that, as you settled down to a cruising speed the bike would "cut" for a split second - almost like it lost all it's sparks and then come back. After that she would cruise and give me at least 140 miles to the tank. Bear in mind I kept well away from the empty end of the scale as the low fuel light has never worked.
Then things changed. The revs on idle dropped a bit but it was still steady. When you rev it sounds like (and is) running on three (Right bank). After 2000 - 2500 rpm the left bank cuts in, the bike kicks you up the backside and you're off! Not safe.
I know she is idling on the right three by the simple test of pulling off the left three plug caps while she is idling - no change. Pull just one of the right plug caps (Any one) and she dies.
With just one of the left three plugcaps off the bike will not rev so I know they are all firing.
Having taken it to the local meet, it was pointed out that there is a smell of unburnt fuel on the left side on idle so perhaps it may be ignition. The carbs have been out countless times, tubes changed, carbs balanced. I've even reversed the gauges in case they were reading wrong. The gauges being Davida so they're reasonable.
I should also say I've measured the ignition coils and pulse generator resistances and they check with the manual. I've also changed the ignition coils simply because I had a spare set.
The good friend mentioned above is lending me a set of pulse generator coils to try even though he still thinks it's a fuel problem. I have three questions for here;
1. Any thoughts?
2. Can anyone in the UK lend me an ECU? All postage costs will be met and ECU returned without argument should not not wish to sell if it fixes the problem.
3. Can the TW sensor be checked without removing it?
Now, where's that wall?