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Post by toshntv650 on Oct 24, 2013 7:28:57 GMT -5
Hi guys, I have purchased a ntv 650, 1995, with 87k on the clocks  . Unsure if I have made the right choice of purchase due to the high  The issue with it is that it fires up with choke no problem but when warm and choke off it runs lumpy and cuts out. The hotter it gets it just runs lumpy but doesnt cut out. I have a hole in the 'Y' joint in the exhaust so its blowing and popping on the downshift or de-accelerating. Could that be the cause of the hole in the exhaust or is it a fuel/air mixture problem Much appreciated Tosh |
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Post by Jake on Oct 24, 2013 8:41:04 GMT -5
Problems may be due to the holed exhaust, that’s
the first thing you should attend too. If that doesn’t
cure things then it could be a carb problem (e.g. blocked jets)
or something effecting the carbs like an old and dirty
air filter. The carbs should also be balanced and the
valves correctly adjusted for smooth running.....
You may need to dismantle the carbs to clean them
and check for a damaged diaphragm...
There's also a throttle stop screw or knurled knob
by the left-hand carb which allows you to adjust
tick-over....
But if I were you I’d deal with the exhaust first,
then buy a new air filter and plugs. If you’ve just
acquired the bike then I’d also do an oil and oil
filter change....
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gills
New Member
Posts: 21
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Post by gills on Oct 24, 2013 12:50:56 GMT -5
The issue with it is that it fires up with choke no problem but when warm and choke off it runs lumpy and cuts out. The hotter it gets it just runs lumpy but doesnt cut out. I'd check your choke needles are going home first. They rely on a spring in the carb end of the cable to return the needle into the valve when you turn the choke off, but they can get sticky and stick out, leaving the choke enrichment on. If not, you'll be into a carb stripdown as Jake suggest. |
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Post by toshntv650 on Oct 25, 2013 10:11:32 GMT -5
Thanks Jake and Giles for your replies.
I may have found the solution to the lumpy idle. I have carried out all the above you guys mentioned but still no change.
When i had the tank off and bike running i sprayed some 'cold start' on the inlet rubbers and suddenly the rpms raised a bit and it was ticking over evenly for few seconds. So I believe that there is an air leak. Im going to inspect the rubbers over the weekend and providing there are no cracks I hope I can apply some gasket seal on them and re-position them ;D
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. Unsure if I have made the right choice of purchase due to the high 
