Triumphrat

itcha · 02-28-2007

Just after some advise from you smart bunch out there. I want to try doing a rejet on my Thrux and have never done so before. I have looked through the rejet 101 instructions on the dinqua website and it seems fairly straight forward even for an office jockey like me. If I follow the instructions to the letter is there any chance that I could do damage to the bike. Also is there any tips or words of wisdon you can offer to a newbie bike mechanic.
Should a rejet be attempted by someone who has never worked on bikes before and not mechanical in the slightest?? I would like to have a crack at it but if you guys reckon it's a bit much for someone like me I will just get the bike shop to do it.

I just ordered the D shaped tool and some 125 main and 42 pilot jets from NewBonneville. (Brent is a really helpful nice bloke.)

Cheers mates.

merlin · 02-28-2007

Think, look, think again. Use good tools. Make sure the screwdriver blade exactly matches the new jets before using it to remove the old. Do not overtighten. An inspection mirror helps visualize things.
Once you're past that you're ready to get the jetting wrong, but what the heck, just keep at it.

ramblinfool · 02-28-2007

Be careful when you pull the jet out of the carb. There is a small brass piece that may or may not fall out. DO NOT loose it. If it falls out put it back smal end up. Should be an easy time for ya though. Have fun tinkerin.

RedBird · 02-28-2007

Put a hand towel or shop towel over the engine case under the carbs to catch what you drop. :-D The main jets screw into the "needle jet holders". I don't recommend removing the needle jet holders because the needle jet can and probably will fall out...use a small end wrench to hold the needle jet holder from turning while you unscrew the main jet and then tighten the needle jet holder if it is loose. The needle jet is a small brass sleeve...it sits above the main jets and the needles ride inside the needle jets...the needles do NOT go inside the main jets. The main jets may be VERY tight...I recommend a 1/4 drive ratchet with an adapter and a new screwdriver bit of the correct size...much easier to get the main jets loose if they are too tight. Don't over-tighten the new main jets like the original ones on many of our bikes...they should be snug/tight but not overly so. :-D

Do one carb at a time so if you drop something and can't figure out which way it goes, you still have the other carb to use to determine the correct fit of the item in question.

Good luck,
Larry

BornAgain · 02-28-2007

Do you still have phillips head screws on the carbs? If you do get the replacement allen head screw kit from NewBonne worth its weight in gold. Makes future jet changes (almost guaranteed you'll be doing it again) a whole lot easier.

Wooly · 03-01-2007

Bear in mind that the Dinqua website advocates removing the carbs from the bike to do the rejet.
While this certainly allows good visibility of the main jets, it is not strictly necessary and many prefer just to remove the float bowls and work with the carbs still mounted in the bike.

Although your working upside down, it' not at all difficult to do.
As already mentioned using a mirror helps a lot to see what's happening.

JJ_Rider · 03-01-2007

Be really careful getting the stock phillips screws out. Use a screwdriver or rachet bit that fits well, and put a lot of pressure onto the screw as you break them loose. I knew all this before I tried mine, but I still managed to strip two heads, which complicated my mechanic adventure a good deal. And as stated above, get the replacement screws so you only have to mess with the phillips heads once.

itcha · 03-01-2007

Alright, if I don't have to go through the process of removing the carbs then I probably would prefer not to. Thanks for that bit of info and I'll also take extra care not to strip the screws. All awesome bits of info from everyone which should make this novice's life a bit easier. Thanks again.

Brooksie · 03-01-2007

The pics are worth a million words.
carb prep

psasak · 03-01-2007

Word to the wise: Drain the carburetor bowls before pulling them - otherwise gas gets all over the place.

I pulled the carbs the first time, the subsequent times, I left them on - not a big deal.