jdeluca wrote on 06/13/11 at 19:18:12:


Does that really work?

I need to clean my carb BAD! and replace a damaged jet or two   Opps

papi_ocho wrote on 06/14/11 at 06:24:34:


actually yes, boiling carbs with water/lemon juice is considered one of the best ways to clean carbs yourself.

The bike still refuses to run correctly.

We totally disassembled the carb, took all the jets out and checked everything. Everything is clean, like very clean. The main is a 155 and the pilot is a 47.5. We tried a different pilot jet that had bleeder holes and you could tell the bike was running richer but still did the same thing...Now I'm wondering if it's the carb at all.

Just to explain again, the bike acts as if it has a rev-limiter. When sitting at idle it sounds great. When revving it at a stand still you can tell it should be revving faster but it still revs. Then when you take off and hit the gas, after about 2/4 throttle it doesn't go anymore, it just stays. Sounds like a rev limiter. It doesn't want to take the throttle. Only takes gas gradually. I do not know how my elevation (2700ft) affects things.

The general consensus around here seems to be the bike isn't getting enough fuel...but this makes no sense to me as the bike doesn't backfire. If the bike was running lean...why am I not showing the extremely well documented and known problem of these bikes backfiring. At this point, I'd LOVE to hear a backfire because at least it'd be something different than what I've been hearing. Thus far, only a tiny "Puh" is heard on shutdown.

I've tried running the bike with the filter out and it doesn't seem to make much difference other than it gets louder. I've tried every spacer setting from stock to no spacer and the bike did not change. I think with no spacer we could smell some gas but it acted the same. With 2/4 washers, the bike revved it's highest, but still not like it should and no matter what it doesn't take the throttle on take off. You have to gradually give it gas.

We've checked the petcock, running in Prime or On doesn't seem to make much difference. On Prime the gas comes out of the petcock in a steady stream.

I'm really getting frustrated here. I'm starting to see why I got such a great deal.

When you checked the petcock,... did you block off the vacuum tap?... or just turn to prime?...
Do this test...
How to check your petcock,...

... also,... is there a small washer under the main jet?... There should be...

I wish w had a KNown Good Carb  & a Nown Good petcock we could ship from victim to victim,, so they could prove where the problem is.

Im still huntin a known good tpyist

Serowbot wrote on 06/18/11 at 14:45:00:


If I remember right we just put it on Prime and pulled the hose, it was shootin' a steady stream of gas. Then during test runs we'd try both ON and PRIME and didn't notice a significant difference.

The washer is there like it should be. I'm not thinking we are starving for gas, I'm thinking maybe we are getting too much.

is my logic wrong in thinking maybe I'm getting too much gas? If I was running lean I'd expect backfiring. I was talking with my brother about it and he mentioned the only time it backfired was when he put the carb together with the white spacer AND a washer. Then while revving it backfired alot and ran poorly.

Too much gas so I mentioned floats, but its not overflowing or leaking. We thought about the needle jet but it was nice and clean. Could all of this really be caused by a overly rich Main jet?

My main is a 155, which came stock so I don't see how it could be the problem. The jetting chart recommends I run a 147.5 since I'm using a stock muffler and filter, but apparently the bike ran with a 155 from the factory so I'm just lost.

The pipe isn't blue, it's a goldish color. The original plug came out whitish as though it ran lean stock as everyone has mentioned. The exhaust doesn't show any signs of being clogged.

The more we look the more it seems to not be a carb issue or something really simple we're over-looking.

Serowbot wrote on 06/18/11 at 17:10:56:


I told my brother what you said. He's going to suck on the hose and see if gas comes through. I'll let you know what he finds.