Gas Gas TXT Pro 300 07 Gearing

[vmeldrew]

Hi

I am returning to trials after a 30 year break and have aquired a TXT Pro 300.

Does anybody know what the 07 standard gearing is?

Mine has 9 up front and 44 on the back, which seems a strange combination compared to what I have read here.

The back end will spin up when I give it some on loose/muddy hills but it never seems to get to the very top of really steep hills either I'm not going fast enough or its spinning. I cant quite work out which yet. I tried a Sherco 250 and it shot up everything when given a handfull.

Any ideas?

[jse]

Hi

I am returning to trials after a 30 year break and have aquired a TXT Pro 300.

Does anybody know what the 07 standard gearing is?

Mine has 9 up front and 44 on the back, which seems a strange combination compared to what I have read here.

The back end will spin up when I give it some on loose/muddy hills but it never seems to get to the very top of really steep hills either I'm not going fast enough or its spinning. I cant quite work out which yet. I tried a Sherco 250 and it shot up everything when given a handfull.

Any ideas?

I think the 07' was an 11/41 combination so yours is geared WAY low. I run a 11/44 on my Pro and like it a lot (stock was 11/42). Other riders like the 10/41-42 combo. I'd try an 11T countershaft sprocket as you already have the 44T rear and you can always try a 10T. If you know any riders who have gone to the 10T, they will probably have the stock 11T in their toolbox and undoubtedly allow you to borrow it to try out.

I'm still trying to imagine why someone would gear a 300 that way.....tractor pulls maybe?

Jon

[smalley250]

Hi i had a couple of issues finding grip having come off a Beta 250 onto my GasGas 300. I have 10/42 and the big improvement was the throttle change from a white/ fast action to a black /slow action, which i now find gives me plenty of control.

I would get a 10T on as you are geared very low and check the throttle body to see what it is as standard is fast action. You can also put a head spacer on which costs

[vmeldrew]

Thanks for that guys, I am thinking I need to get it to standard and then work out whether the low gearing was the problem.

Thinking back it does seem a bit underpowered so I am probably giving it so much welly in a low gear, just to get the speed up. The throttle response seems fine.

Al

[manx2day]

i ran 11/42 on my 300. was brilliant and i found it much better than than 10/42, it enabled me to use 1st gear a lot more which i wouldn't use with 10 on the front.

[smalley250]

The throttle body does matter as most of my friends and i are inters and we all use slow action as fast action spins up. I find 11 42 to fast for slow rock sections as you end up using the clutch way to much. A ex brit champion made me ride a section without using the clutch as he said if you use it then you are starting off again finding traction each time you use it. Since then ive always ridden in lower gears and found it better.

[sting32]

Thanks for that guys, I am thinking I need to get it to standard and then work out whether the low gearing was the problem.

Thinking back it does seem a bit underpowered so I am probably giving it so much welly in a low gear, just to get the speed up. The throttle response seems fine.

Al

Al,

I did what you're doing now, only 11 years ago, and a "bike" ago. the new bikes are much "quicker" than we had back in the 80's or earlier. What you can do to soften the hit on the Gasgas is 3 things, semi easy: (after you go back to 10 or 11 counter sprocket).

1 richen the pilot jet a notch, as long as it doesnt load up and die it will be blubbery less crisp and easier starting.

2 find a trials gasgas mechanic that knows his stuff, the base gaskets (under the cylinder) are sort of color coded for thickness, or least they used to be. I have taken my 300 (via my Gasgas Mechanic) to a thick bas gasket .008 mm instead of the .003, this lowers the compression slightly and makes the bike (slightly) softer like we used to be comfortable with. Softening will help you build confidence and to keep the bike UNDER you. Slow throttles wear my wrist out, but many use them. Black throttle is slow, white is fast (that is the tube the grip sticks onto and runs the cable). Be careful, over softening can bite you later, soften it like I said as you gain confidence, go back. that way when you get the next bike (newer) it won't be such a HUGE jump, like I have myself just this last month, have had to adjust to.

3 lastly, depending on year and possibly model, the carb can be changed. The Delorto on a 300 is much softer and smoother (IMHO) than the Kehin. Now "S3" is a company making accessories, they make variable compression heads (you swap inserts for different compression). if the 300 is "older" the rings will be worn and the bike already should be softening up.

I came straight to trials from Expert class in the USA of the 1984, to the older "TXT" (the model before the pro we have now) which was softer and as I got better I wanted it to be less soft. I ride Sr Expert now, which is like intermediat with some easier expert lines.

My father who is 74 years old joined me, he rides Amature, he does better with the 10 tooth countershaft gear with 41 or 44 rear. because the amatures dont have BIG objects mostly big 3ft logs or there abouts. I cant stand the 10 on front becuase like you said, slippage due to leverage the engine gets, you can nullify that by running in 2nd instead, to see if you will like the 11 tooth, while you have your 9 on there, it should feel about like a 11 in first.

Everything is done with the CLUTCH, you slip the p*** out of them to go slow, 78% of the time my clutch is NOT in fully enguaged mode, while riding the sections. Big stuff is 2nd gear or 3rd with my 11 tooth & stock rear (give and take as you get better you wil modify to your liking).

With you just getting back to trials, this will take about 4 months of intense practice to get "comfortable" with A: slipping the clutch all the time, and B: using 2nd or 3rd even though you are riding really slow and tight portions of some sections, before the big stuff. Actually I shift if at all possible, the old Bultaco Sherpa-t's were hard to shift with shifters all bent out of the way, if you recall BUT, these bikes are easy to shift.

Hope you get along well, it has been more fun than I remember even though I'm older,

Many here will argue, and mine above is an opinion, use what you see fit, and give em hell.

Edited October 8, 2010 by Sting32

[sting32]

In my previous post, I WANT to retract the part where I said try a bigger pilot jet in the carb, to calm it down a little. It seemed like a good idea at the time, and running around the garage... But in the trials, it sucks. My beasty was hard to take with it slobbering at idle to 1/4 throttle then it would run better, but it was not recovering from over rich idle the same every time, and wasn't worth the scare factor, and IMHO made me less confident on what the "bike was going to do when I cracked the throttle."

[vmeldrew]

Thank you all so much for taking the time to answer my post.

I fitted an 11 tooth sprocket and the differece was unbelievable. Its suits my riding style perfectly.

I can now sail up the inclines I was struggling with without a problem and there seems plenty more torque and grip.

Al