lineaway

It also could be the throttle tube is cracked or full of dirt.

Bad cable, dirty carb or bent needle.

A few bikes have a cap that breathes. I would not worry unless it leaks all over.

Is it a Mono or a twin shock. Sounds like the chain, chain tensioner or suspension. Did you adjust the chain after you got the bike?

It does not have a smaller jug, just more usable power. Remember the Beta 200 started as a 250 and become a 200.

Have you ever had a Fantic? Mine has a one finger, easier than my son`s pro gas gas. Just finished a 24 mile trial riding with only modern bikes. Besides being way hot, being air-cooled, it worked just fine. It was practice for our ITSA finale for the year. The old twin shocks are even better with a working clutch. Not using the clutch went away in the late seventy`s.

94 thru 97 will fit. I believe the sub frame changed in `98. If is only cracked or split in two, patch it up with zip ties.

Sounds like you are going in the right direction. Must have been an early `04 to have that carb on it.

The speed of a throttle tube has no correlation to a flywheel weight. I would try the two together! Not the first idea on this, but a fine looking product.

Oh one minor gripe.. you can't seem to tell how much fuel is in the tank so no idea if you are about to run out or not. a sight window might have been a nice touch. Look at all the Gas Gas pro`s. You can`t see the level in most of them either. Just top the tank and go. No worries.

Usually you leave the selector in neutral while assembling to make sure everything is free and clear. Good luck, I`m sure you will get it. Just don`t tear the center case gasket.

When the pro first came out we left that bolt out for more flow. Plus we were always fixing the clutch, so it just made it easier.

I believe Gas Gas goes by Iso 3780 standards and California goes by North America standards. Cali dmv is just not smart enough to recognize the Europe standard.

So why do you not just rebuild it. The cases are bad?

The vents are correct then.

(I'm not that comfortable with speed, I thought a bit of competition might get me going and improve my confidence.) Entering a competition is not the `HOW` in learn to ride.

It still could be something else, but that is where I would start.

A 12 year old Pro, first thing I would do is pull off the mag cover. Grab the flywheel and move it vertically for play. Any play would suggest mains and seals. Also are the vents to the carb clear and where do the hoses route to.

Seems I remember through the rumor mill that the importer had to re-do the vin for cali bikes. Did your bike come from another state?

* GASGAS Pro Technical bulletin June 8th, 2010 Application: 2002~2009 GASGAS “Pro” model motorcycles. Subject: Clutch slave cylinder repair hints, applicable o-rings, and alternative parts availability. Information on water pump updates. Periodic maintenance and repair. GENERAL CLUTCH INFORMATION For 2002 GASGAS pro. The “clutch cover” update kit: Beginning in the 2005 model year, all Pro model hydraulic clutch systems use mineral oil. (Applicable to the 2004 Adam Raga special edition models also) A “kit” is available to convert the clutch cover~slave unit on 2002 Pro motorcycles, into the improved 2003-06 aluminum redesigned version. This kit includes all components necessary to convert from DOT4 brake fluid to Mineral oil. NOTE: THE BRAKES USE DOT 4 FLUID. NEVER INSTALL MINERAL OIL IN A BRAKE SYSTEM! The kit includes the following: One 2003~06 type aluminum clutch cover (2002 models are magnesium) all necessary o-rings gaskets, and seals. A seal kit to convert the master cylinder on the handlebar to accept the mineral oil. Contact the GASGAS dealer nearest you for more information. GASGAS part number MT280532001CR

Are you sure that is not the 200. ( It also looks like a 2003?) Hard to tell by the vid. You can tell by the vin number. Most people ran a 38 pilot on the 280. At sea level the 107 would be way lean.

Need to know what jets are currently in it and at what elevation you ride to decide which way might benefit the jetting of your bike.

Put the old fan back in. Do not over heat it. Sometimes you can push start a bad fan. Try it just to see how it runs. Or you could just buy the right one.

(The problem is at idle with throttle closed. I talked to someone about a different pilot and he said the fuel screw covered the range of several pilot jets so if the screw is not getting me any benefit this is not the problem.) That statement came from someone with NO jetting experience. So you are going to replace the top end without knowing you have the right jets! Just send me your credit card info and I can fix it! P.S. If the exhaust is plugged up it will feel lethargic.

It is MT280236162 on the primary shaft. Replace all needle bearings on the primary. Much cheaper than a complete tranny.