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The TTR250 FAQ web pages -> TTR250 -> Just joined the forum? -> hard starting cold 2005 ttr250
Post Info TOPIC: hard starting cold 2005 ttr250
BigJim


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hard starting cold 2005 ttr250
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Hi friends of tt-r's need some help got my bike 3weeks ago ran ok but had been sitting for two years gas was bad so cleaned tank put new drain **** and fuel line and rebuilt and rejetted carb and added a k&n filter it already had a fmf 4 core muffler on it new plug also has trouble starting cold after its ran a few it starts easy and runs great. please advise me.

 

            Many thanks. Jim



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comeragh


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cold starting is usually got to do with the air screw you may have screwed it in too much .

I usually go for a base setting 2.5 turn out and adjust to give best low idle and starting .

when it is right it should start even with a gentle kick .



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BigJim


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Did that still hard starting. 



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TT-R250M


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When you rejetted what jets did you use?

Any other sypmtoms at all that might help us track this problem down?



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2000 TT-R250M-

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TT-R250M


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Things to check first

Ground the spark plug against the engine- do you have nice bright blue spark?

Remove the carb and fill with fuel- does it squirt a nice stream from the starter jet when the throttle is applied?

Does your choke curcuit work as it should?

Next steps

Run Sea foam (I use Subaru upper engine cleaner) through the engine, making sure that you do an oil change afterward.

Check valves are in spec.

Check compression when cold and compare to factory specs, then check when hot and compare to the cold reading.

 



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BigJim


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the bike shop sold me the 52.5 idle and 145. main jets just hard starting was that way before i cleaned everything replaced parts checked float level its good if i crank it trys starting but if i wait a sec and try again it trys again i read on here about the chock being bad.

 

Thanks, Jim



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BigJim


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thank you I was just think about the valves as I read our post will do thanks again good spark.

 



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texasT


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Welcome to the fun Big Jim,

Lots of great advise for you to read about here. Nice folks too.

I'm using the NGK-CR7E plug, slightly hotter than the stock CR9E, & noticed that it doesn't take long to get started and warm up.

Jarrah has started to help and others will likely chime in as well.

You will get this figured out with their help.

greg



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'04 TT-R250sc Blue model U.S.A.
ttr250slw


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you may also want to check that the float bowl height is right with a peice of clear hose connected to the carby bowl drain



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2005 ttr250

b&b bashplate, barkbuster, pro taper 7/8ths bars.
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