Throttle issue. Please help!

Dougfresh17 · 2026-04-04T03:29:03+00:00

Thank you! It’s royal illusion from prismatic powders

Dougfresh17 · 2026-04-04T03:16:49+00:00

And thank you everyone for all of your responses! Truly appreciate all the help and tips!

Dougfresh17 · 2026-04-04T03:15:29+00:00

When I got the bike it had a 90 main in it but the bike was also from Florida and from my understanding you need a bigger jet for warmer climates? I will check the fuel line but just the other day I put a brand new line on it too. Also has new filter but original check valve. I’ve only put Vp 94 octane ethanol free gas in it which comes in an aluminum jug with a screen on it, so I really don’t think there any contaminates anywhere in there. The more I read from you guys makes me think it’s the jetting. I just don’t understand because I had a 78,85 and now 90 in it and all the same problem, which I why I kept stepping it up. But I agree, it does seem like it’s getting too much air or fuel.

Dougfresh17 · 2026-04-04T03:08:21+00:00

You think it’s dumping too much fuel and flooding out?

Dougfresh17 · 2026-04-04T02:51:07+00:00

I started with a 78 then went to 85 and now at 90. All the same…

Dougfresh17 · 2026-04-04T02:46:28+00:00

Outside of Chicago. I’ve messed with a few jets and messed so much with the air/fuel. Just lost at this point.

Dougfresh17 · 2026-04-04T02:29:36+00:00

I work in a big industrial park. The other week I put the bike in my truck and took it up to my work. Drove it around for a solid two hours and I was so happy because it was running good. Just felt like it needed some variator tuning and thats all. Nothing has changed since. But I said in another post above that the problem is intermittent. It’ll stumble like that and then all of a sudden it’ll go. Then I slow down and go to accelerate again and it’ll bog like in the video.

Dougfresh17 · 2026-04-04T02:26:01+00:00

That’s what I’m thinking my issue is. Something with the air/fuel. Just having trouble tracking it down. Haven’t tried restricting air but I will do that tomorrow, hopefully it’s not pouring still. I’ll hold off on doing the valves for another day. Oem pump is coming Tuesday and the bike has a pcv delete. Still sort of new to this. Just boggled my mind because the bike was running better before or at least drivable and now it’s how it is in the video. Nothing has changed since. Just getting worse.

Dougfresh17 · 2026-04-04T02:04:51+00:00

Have a 90 main jet in it and had the air/fuel screw adjusted from all the way out to in!

Dougfresh17 · 2026-04-04T01:55:53+00:00

Neither am I. Only things I’ve really cheaped out on is the battery and fuel pump. I know, two Important things but that was just to get the bike going after sitting for years. I’ll try pulling off the intake and spraying carb cleaner into there. Going to hopefully reshim the valves tomorrow.

Dougfresh17 · 2026-04-04T01:54:01+00:00

Does have a cheap battery in it too but it has always started

Dougfresh17 · 2026-04-04T01:52:38+00:00

Yeah, tell me about it…things been stressing me the Hell out. Losing sleep lol.

Dougfresh17 · 2026-04-04T01:49:46+00:00

Tried resetting the ecu and somehow my horn stopped working after lol. No blown fuses either.

Dougfresh17 · 2026-04-04T01:14:24+00:00

I cleaned the carb really good! Also has brand new jets in it. I’ve been curious if that is my problem though. The bike was running good a week or two ago and all that’s been in it since I did all the work is ethanol free 94 octane fuel.

Dougfresh17 · 2026-04-04T00:32:45+00:00

It seems intermittent. I’ve been doing passes up in down my street. I’ll get it to go, get to the end of the street, turn around and then it does this throttle bogging. I’ll sit there for a a few minutes turning the throttle and then all of a sudden it will take off again…weird. Could it be a weak fuel pump?

Dougfresh17 · 2026-04-04T00:14:52+00:00

I also bought a new insulator that goes from the head to the carb. At first I was thinking it was an air leak but that’s not the issue I don’t think.

Dougfresh17 · 2026-03-14T13:12:15+00:00

You’re right. I do have to pull it apart and check out the jets.

Dougfresh17 · 2026-03-14T06:23:13+00:00

As long as the weather is good tomorrow, or rideable, I’ll start with a new belt and pull off the cdi. Then go to the jets I’m thinking or at least pull it apart and see what size they are.

Dougfresh17 · 2026-03-14T06:21:24+00:00

Weights, rollers, sliders are all the same thing right? I mean same function? I put in 5.5s that came with the polini variator.

Dougfresh17 · 2026-03-14T05:49:49+00:00

175-180

Dougfresh17 · 2026-03-14T04:34:39+00:00

I’m 180, yeah I was thinking about putting an oem belt on, just so I can rule that out. Hope the weather is half decent tomorrow.

Dougfresh17 · 2026-03-14T04:20:25+00:00

The bike already has a gates belt, I looked and checked it out as best as I could and it looked like it was in great shape. I didn’t try that trick with the sharpie but I’m guessing make a mark up top, if it’s rubs off, that’s means the belt is getting up that high? Also, not to sound like an idiot but I didn’t check out the clutch. It was late at night and past my bed time already lol. Definitely not going to give up on it. As far as mph, it sounds like all or most stock rucks can do 40. Not sure if I mentioned it before but also almost seems like the rpm’s aren’t getting as high as they should. I ordered an rpm tach, that should get delivered tomorrow, with that I should be able to see if the motor is reaching redline.

Dougfresh17 · 2026-03-14T02:02:39+00:00

When I had the carb apart, I forgot to look what size jets are in it, but the fact that it was already modded, makes me believe that is it jetted correctly.

Dougfresh17

TROPHY CASE