vtr thou starting probs
- cheekeyarab
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vtr thou starting probs
having probs starting my bike takes ages to catch then backfires when it does, occasional backfire when running. spark plugs been replace bout a month ago. idle doesnt stay the same either, any ideas?
- Gazza
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If the problem started since installation of the new plug, then it could well be the plug, or possibly the HT lead not fitted correctly or damaged during the installation.
The backfire is probably caused by too much fuel building up before the bike fires.
Note that most vehicles do not need throttle to start these days, doing so can flood and cause problems. If an engine does become flooded, open the throttle fully (to reduce manifold pressure) this will actually lower the fuel/air ratio with a standard carburation set up. Keep the throttle open fully do not keep yanking it open, because if you have an accelerator pump within the carb it will simply squirt more fuel in with each yank. Turn the engine over with the starter and if it catches, back off to nothing and catch it on the choke. If that doesn't work you have to either wait a long while or take the plug out and dry things off.
The backfire is probably caused by too much fuel building up before the bike fires.
Note that most vehicles do not need throttle to start these days, doing so can flood and cause problems. If an engine does become flooded, open the throttle fully (to reduce manifold pressure) this will actually lower the fuel/air ratio with a standard carburation set up. Keep the throttle open fully do not keep yanking it open, because if you have an accelerator pump within the carb it will simply squirt more fuel in with each yank. Turn the engine over with the starter and if it catches, back off to nothing and catch it on the choke. If that doesn't work you have to either wait a long while or take the plug out and dry things off.
- CBRXX
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When I had mine it was a pain in the erse to start untill I realised the reg/rec wasn't earthed properly this was causing a poor spark giving a rough idle and backfiring on startup the head lights dipped a fair bit too when idling cause it wasn't charging properly.
Its on the right hand side of the rear subframe as you look towards the handle bars from the back (you'll need to get the plastics off to get at it), make sure the eath wire is touching the metal base plate between the reg and the subframe and isn't just on between the reg and the bolt head.
check its charging properly at the battery first though with a volt meter should be putting out about 14V when running
Its on the right hand side of the rear subframe as you look towards the handle bars from the back (you'll need to get the plastics off to get at it), make sure the eath wire is touching the metal base plate between the reg and the subframe and isn't just on between the reg and the bolt head.
check its charging properly at the battery first though with a volt meter should be putting out about 14V when running
- al
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Naaa, just keep the throttle pinned once it fires up.....Gazza wrote:Note that most vehicles do not need throttle to start these days, doing so can flood and cause problems. If an engine does become flooded, open the throttle fully (to reduce manifold pressure) this will actually lower the fuel/air ratio with a standard carburation set up. Keep the throttle open fully do not keep yanking it open, because if you have an accelerator pump within the carb it will simply squirt more fuel in with each yank. Turn the engine over with the starter and if it catches, back off to nothing and catch it on the choke.
....got to let these things know who is in charge
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- cheekeyarab
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- cheekeyarab
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