Need help with jets

[SteveCZ28]

if i did decide do go with a aftermarket/different carb. what would be a good carb for this? i know i have a 38mm flat side on the tecate, and it runs like a raped ape. could i get a 38mm on the r also??? and what mods would i need to do in order to run a larger carb?

[whyzee]

I always kept mine stock so I can't offer any advice.
please keep us posted.

[SteveCZ28]

i found a few pj series carbs, but i dont know if they will fit my intake. so im waiting for answers from a few people

[SteveCZ28]

ok this is where im at. i put my spare carb together. put it on the bike. 3rd kick it started right up. and idles really good on its own. took it for a ride, its lacking power, and now seems lean, so im heading back out to fatten the main up to a 145 that i have, and will see how it does then. atleast im getting somehwere now

[whyzee]

Seems like good progress today!

[SteveCZ28]

Yes I do consider this good progress. Even tho I couldn't do a plug chop I did checj the plug and it was dry so that tells me its lean too. That and I didn't have smoke out the exhaust either. I'm 2 mins from firing it back up

[SteveCZ28]

well i lost all daylight, so i kind of ran out of time. put the 145 in, and its still lacking power. moved the clip on the needle all the way down to see if i could get it to have some power, but it didnt help. did my best at another plug chop. checked the plug and its still dry. so now im waiting on the jets i ordered earlier this week, and go up another size on the main. but atleast it starts right up and idles. its probably the easiest its ever been to start since ive had this thing

[Dirtcrasher]

All I can tell you is this; Even when you get a full pull out of that motor, it may be very lean. Lean motors border lining on "seizing" run great and many people think there all set.

With no airbox, if I put myself in your shoes, I'd plan on starting up very rich. Then work myself down with some testing.

I know these are apples and oranges, but I merely took off an A/B lid, tossed in a mid range cam, and a Supertrapp exhaust. My 350X has gone from a 138 main jet to a 155 and it is not rich. No porting, no other mods. I'm betting I can run a 160.

You have opened up your air flow immensely as well as the exhaust. It wants FUEL.......

So just be careful and not a statistic. Listen to Pedo bear will ya

[SteveCZ28]

LMAO pedo bear knows all...yes im just waiting on my jet kit to arrive. im running a 145 now, and it still isnt nearly enough...i guess ill just jump it to the 150 that is coming in this variety pack i bought. and see how she does there...

im still running whats left of the 28:1 fuel....is this helping or hurting me???? my opinion atleast is i have the extra oil, to help me in the potential lean conditions im having currently....im hoping my airbox shows up tomorrow. and ill see what she does then...

[whyzee]

Agree with DC 100%.. keep jetting up until it bogs at 3/4 + throttle, then back it down to where it is crisp.
with your mods you very well could be experiencing a lean bog now. I would throw a new plug
on it also.
if your jetting is right you can run 28:1 perfectly. Anyone who cannot get it to run properly at 28: 1 has never jetted properly , including the proper plug heat range for your type of riding.

[Dirtcrasher]

You've done your heat cycles, dump the rich gas. It has a large factor in jetting that your not familiar with.

More oil in the gas means less gas in the air /fuel ratio.

I know, I know, I did it when I was younger myself. I felt my 2 strokes needed a richer pre-mix so they would be "lubed up" enough to break in.

The biggest issues I see at allot of these builds is too many things get changed at once, then the owner is scratching their head "why the heck isn't this running like a raped ape??"

Had you broke it in with the stock air box and exhaust, you would be questioning much. But you have changed the flow of fuel/air immensely and added more oil to your mix.

It's a recipe for disaster........

[SteveCZ28]

ok, but obviously my jet is still too small for the stuff done, ie open k&n pod, and exhaust....how will 32:1 help me in this situation??? wont it just seize that much quicker while trying to find my right jetting??

[Dirtcrasher]

Your confusing a lean oil mixture with a lean fuel/air mixture, either of which can cause seizure.

MORE OIL IN THE GAS MEANS LESS GAS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Less gas and more air = BOOM.

Fix the mixture, jet it FAT. And understand that idling with a pilot jet at low RPMs is nothing in comparison to WOT at high RPMs with the wrong main jet.

Did you read the link I provided ?

[SteveCZ28]

oh ok. i got you now. ill dump the gas in the morning then. im not going to run it anymore until i get my jets in the mail then. i dont wanna lock this beast up

[Dirtcrasher]

Atta boy!!

IDK what jets you ordered but I'd rather see you jet this with an airbox, get some hours on it, then if you want more power, ditch the airbox and jet up again.

Jetting is NOT FUN! I get so sick of taking the carb off depending on the model. But once you do it 10 times, it's about a 5 minute change and your main may or may not be accessible from the float bowl for a 2 minute exchange. I don't have an R in the garage now........

EDIT - And, BTW - I bet I have 500$ plus worth of jets for just 3 or 4 motors. It's never an etched in stone experience and you have to have evrything on hand or you won't be riding.....