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  Topic Review (Newest First)
09-18-2017 08:22 AM
SergheiS Turns out that the choke cable doesn't have enough slack, and was forcing the choke to stay open. I had to disconnect the choke cable in order to let it close fully. It runs fine & starts warm no problem now, just cold starts require me to hold the mechanism by hand until it warms up enough...
09-17-2017 07:34 PM
Paulywog I don't use any throttle when hot either,I just touch or bump the start button hot or cold with choke.
09-15-2017 10:35 PM
Birdhunter02 Don't use any throttle when hot starting.
09-15-2017 09:58 PM
SergheiS My issue seems to be tracing back to the fact that the choke won't fully close, leading more gas into the cylinder. I have a thread opened about that.

https://www.vn750.com/forum/22-carbs-...tuck-open.html
09-15-2017 03:33 PM
Spockster
Quote:
Originally Posted by Goofyfoot2001 View Post
So now that you mention it, when I replaced my petcock with the tw200, I don't think I had any hot start issues again. It ran better too. So maybe that vacuum is affected by the heat and that changes pressure etc. ? It's a $15 something to try.
When the petcock leaks gas through the vacuum line, it richens the front cylinder while running. But the bigger problem is after shutdown, gas still flows through the vac line, which fills the front cylinder (flooded) and gas ends up in the oil if it's parked long enough.

I'm not sure even turning the petcock off, stops all the flow through a leaking diaphragm. Think I could still ruin an oil change just parked with the petcock off for a week.
09-15-2017 12:27 PM
Goofyfoot2001 So now that you mention it, when I replaced my petcock with the tw200, I don't think I had any hot start issues again. It ran better too. So maybe that vacuum is affected by the heat and that changes pressure etc. ? It's a $15 something to try.
09-14-2017 11:08 PM
Spockster Mine never will hot start with the throttle open, even have to choke it sometimes after just a few minutes being parked. If I open the throttle at all it just backfires.

Sounds like a mix of some flooding maybe, with an air leak. Check the carb boot clamps (air leak) and check the petcock vacuum line to make sure there's no gas in it (flooding front cylinder).

AGM battery makes for better starts, and the Two-Wire Mod can help with hot starts also. Both help with voltage.
09-14-2017 11:07 PM
SergheiS Another question, how much movement should the choke plungers on the carburetor have? I can put my choke lever all the way forward/choke off position, but I can push the plunger in more with my hand on the carburetor. Is this normal?
09-14-2017 10:45 PM
SergheiS It'll occasionally make a (small?) pop, I try to let it sit between longer cranks to avoid flooding
09-14-2017 10:37 PM
OleDirtyDoc does it backfire loudly when trying to start? if so,look into an AGM battery.also look up the pick-up coil mod

Sent from my LGL34C using Tapatalk
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