12 replies to this topic

[Brian R]

Hi folks,
Playing with a 250 barn project. It actually starts and runs. However, it doesn't idle.
Seems like I need to screw in the idle adjustment but it's already in all the way.
Any thoughts?

[max1956bikes]

carb needs cleaning

[Brian R]

OK,
cleaned it once, but I'll do it again. I even used my ultrasonic cleaner, but I've seen that happen before.

Thanks

[max1956bikes]

sounds like you have cleaned carb well.take out air screw i use wd40 with red pipe on to make sure it comes out in 2 places.through pilot jet and small hole back of slide. also points set at 12 thou.also if it smokes may be piston rings sticking.or air leak on inlet manifold.

[Trial Pat]

if it is a Honda TL 250 4 stroke 1975/76, then it is important that the ignition is set properly: distance of the breaker 3-4mm, check timing with a stroboscopic flash, check, that the mechanical advancer works.

Mine had something in the exhaust, be sure, exhaust can breath freely

Do you mean idling at low revs or it does not turn in high revs?

Good luck from a Swiss

Patrick

[Brian R]

Hi Pat,
It revs fine, it just won't sit and idle and needs constant blipping of the throttle. It's close but no cigar.
I'll pull the carb again. I need to pull the 125 carb and clean it anyhow. I need to play with the Beta carb too.
Maybe I'll have one big carb playing day!

[Brian R]

Spring is here and I got the 250 to start and run fine. It was a pin hole in the float, replaced the float and problem solved.

[Trial Pat]

Hy HondaTrials

I fitted an Oko 24mm carb with power jet (deactivated) today, bought at ebay from Taiwan. Fits the inlet rubber, but to the airbox I found an old Montesa rubber (49mm instead of 42). After some trial and errors, the engine works quite well now. Slow jet 38 (like Keihin original) and main 112. I had to hang the needle at top clip (leanest) position. It starts easily and pulls at low revs. On the first street test, it is quite good, but not reving totally high, but pulls quite strongly now til 4/5 gas. I started with a 115, then 120, then 110, now 112 main jet. Trial test to follow soon.

Does your TL rev up like a cross engine? or is there kind of a limit ?

Regards

Patrick

Edited by Trial Pat, 18 April 2010 - 08:00 PM.

[N714AG]

My TL250 has stock carb, retarded ignition timing and will continue to rev until the valves start to float!

[Brian R]

Hey Murray,
How's it going. Is that the TMI frame?

[N714AG]

Yea it is...got it back from Bob last summer...I've ridden it in three events so far...sweet...

M

[Brian R]

Looking good.
Lets hope we make it out a little more this year.....

[axulsuv]

Brian ;
The TMI looks better in person , It even keeps a smile on Murray's face non-stop when he's on it !
Glenn