440 Trail needle jet Q-0 (166)

manitobatrailfires · Post by **manitobatrailfires** » Wed Mar 11, 2009 6:57 pm

Hi,
Looking for correct replacement jets for Trailfire 440.
The engines are '79s. The manual lists newer jetting in '80 and up, something Rich explained was a year-to-year reliability improvement in earlier posts, so I thought I'd put in the newer jets.
Several catalogs I've looked at, Sun and Snow in Manitoba and Recreation Supply in Saskatchewan, list the Q-0 (159) for 30 to 36 mm carbs and the Q-0(166) for the 38 mm carbs.
The Fine Tune Manual I have from '81 (thank you vintagesnow.com) specifically mentions the second number with a needle jet as critical, and lists the Q-0(166) for the 440 TF. My gut is to follow the recommendations of the Fine Tune Manual, as catalogs are by necessity very generalized listings.
What do you recommend I order in?

And, if I find one of the carbs already has the right needle jet, do you think I should spend the $20 and replace it, or just dunk it in Kleen Flo and inspect it?

Thanks for any help.
Eric

webman · Post by **webman** » Wed Mar 11, 2009 8:13 pm

You can get the jets at Greggs Suzuki at 1341 DUGALD RD. Was able to get all the jets for a 80 liquifire there. If they are cheap enough I would say go new.

As for which one, I also would use the ones recommended in the FTM, but someone will likely now better.

manitobatrailfires · Post by **manitobatrailfires** » Wed Mar 11, 2009 11:33 pm

Great, thanks for the advice.
I got Gregs to press on new crank bearings for the last rebuild.
Eric

jdcat · Post by **jdcat** » Mon Mar 23, 2009 10:02 am

Dont know what to think of on the John Deere PIP specs, I tryed a 166 needle jet in my 79 trailfire 440 , & the jet was too short for the vm34. I had to order a 159?

manitobatrailfires · Post by **manitobatrailfires** » Mon Mar 23, 2009 12:47 pm

jdcat,
I quoted your original post about this problem in the General section.

http://s12.zetaboards.com/jdsleds/topic/5022288/1/#new

I found the same thing you did. When I pulled apart the factory carb it had a 159 in it.
I'm hoping a couple others who are taking apart TF 440 carbs this summer will post what needle jet they have. So far one other has found the same thing. I have one more TF carb to inspect. If our findings all match, we can get a post put in the FAQs explaining the situation.
Eric

jdcat · Post by **jdcat** » Tue Mar 24, 2009 10:10 am

I replaced all jets to JD specs on this carb, the Jet Needle 6F27-3 was hard to find so i matched it as close as possible with the 159 needle jet. Clean carb, rebuilt fuel pump. Still have to spray fuel in the carb to fire it up & spits out alota fuel from half throttle up. Also cant get the engine to idle, Acts like its running way to rich. Ive decided to install new seals, with a rebuild this summer. manitobatrailfires, When you get a chance to look at those carbs see if youve got an air jet in those. Mines threaded for a air jet, doesnt have one . On the JD parts site they list air jets for the 79 340,440 trailfire yet tech manual doesnt list them. Always wondered about that.