1978 sp 370 wont idle without choke - Motorcycle-Journal Forums

docholiday0425 · 07-05-2006, 10:37 PM

it runs fine otherwise but wont idle without the choke about 1/3 on the carb is very clean. the engine starts very easy usually on the first try.
ive tried everything i can think of any suggestions will be a big help.

**Louis** · 07-12-2006, 06:20 AM

anyone???

**Clint** · 07-12-2006, 07:13 AM

The carb may be clean, but something's preventing fuel flow. Either the low-speed mixture is very lean or something's blocked.

menotallhere · 03-30-2007, 10:06 PM

hi,your idel jet is clogged.use a speaker wire to run through your jet.dont just soak it.also try a fresh spark plug.sometimes they foul and people think its a carb problem

mikestp · 07-21-2007, 08:42 AM

turn the idle up maby?

jws3 · 09-26-2007, 10:58 AM

Air leaking will cause the bike to run lean. Had the same thing happen to me on an old TS185.

mike-s · 09-29-2007, 04:06 AM

Quote:

Originally Posted by menotallhere

hi,your idel jet is clogged.use a speaker wire to run through your jet.dont just soak it.also try a fresh spark plug.sometimes they foul and people think its a carb problem

Just be careful with using metal to clean the jets out as they are made of brass theres always the potential for you to enlarge the size of an air/fuel jet. A better option is to use nylon (fishing line or some scrubbing brushes) or horsehair (paintbrushes). A REALLY good idea is to use a can of carby cleaner, strip the carbies (one at a time) and use the cleaner to flush the jets through the body (theres NO chance wire would get through to clean it as its often an insanely long and bent channel)) and then do it again just tobe thorough.

Im going through a similar thing with a bike i recently bought, my next step is to run a compression test and im hoping like heck that it's got a decent bit of compression. I've already taken the carbies out and cleaned then 4 times, each time i got out MORE gunk than i did the last, only now i've done it 4 times am i satisfied its internally clean enough to be viable to use.

07-05-2006, 10:37 PM	#1 (permalink)
docholiday0425 Newbie Joined: Jul 2005 Posts: 18	1978 sp 370 wont idle without choke it runs fine otherwise but wont idle without the choke about 1/3 on the carb is very clean. the engine starts very easy usually on the first try. ive tried everything i can think of any suggestions will be a big help.

07-12-2006, 06:20 AM	#2 (permalink)
Louis Administrator Joined: Sep 2003 Bike: SV650S '05 (Blue) Location: Gatineau, QC, Canada Posts: 10,650	anyone??? __________________ Louis

09-26-2007, 10:58 AM	#6 (permalink)
jws3 Newbie Joined: Sep 2007 Posts: 1	It is very possible you have an air leak where the carb meets the rubber boots. Air leaking will cause the bike to run lean. Had the same thing happen to me on an old TS185.

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03-30-2007, 10:06 PM	#4 (permalink)
menotallhere Newbie Joined: Mar 2007 Bike: 1986 SP 125 Location: virginia Posts: 14	hi,your idel jet is clogged.use a speaker wire to run through your jet.dont just soak it.also try a fresh spark plug.sometimes they foul and people think its a carb problem

07-21-2007, 08:42 AM	#5 (permalink)
mikestp Newbie Joined: Jul 2007 Posts: 14	turn the idle up maby?

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