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Just bought the bike a couple days ago and need direction and guidance for repairs. No luck searching Google. Happy to have found this Awesomely informative site! Thank you all in advance.

@Noel09 https://www.trialscentral.com/forums/topic/80228-fuel-tap-solenoide https://www.trialscentral.com/forums/topic/64519-beta-4t-fuel-tap-solenoid/

@Noel09 www.betausa.com -support - trials - owners manuals = MIKUNI SE BSR 33-79 The information is all there. Regards Alan

Hi, sorry more questions. I'm trying to figure out my fuel system on the 2007 rev 4T 250 4-stroke. Mostly out of curiosity so if anyone knows them and could fill me in I'd be very thankful. OK in the manual the fuel tap has a weird looking fuel tap? My doesn't have the same. I'll add some photos. Mine also has a fuel outlet at the back of the tank with a weird nob on it? The fuel outlet on the side of the tank doesn't seem to have an on/off? The fuel lines go into a little chrome cylinder which I'm guessing is a pump? It plugs into the wiring loom. The block connector the feeds it has 2 extra wires that have been cut? It also has a hot start cable that runs into the bottom of the intake manifold but some cut the cable at the headstock? Do I need this? Thanks again everyone for help and advice. Noel

Hi everyone. I'm totally new to trials and just bought an old 2007 rev 4T 250 4-stroke. I'm fixing a few things and have a carb question. What carb is in my bike? I want to order a kit as the bowl gasket it weeping. The carb is a mikuni. There is some writing on one side. Looks like 33 79 L691? I did ask chatgp and it reckons it's a mikuni BSR33? But just want to make sure. Thanks Noel

For any person who has an interest . This gives some insight and interestingly from three riding levels which gives balance that is normally absent. https://youtu.be/3w_WxS411wY?si=ukWNMnZagaC 51:25 is the part of the video that specifically talks about marking regs. Regards Alan.

Tell of too much oil in your pre mix is how badly the exhaust plugs up with unburnt oil residue, naturally fuel rich condition intake also relates to oil rich. Your air cleaner filter needs to be clean and oiled correctly or that will starve the engine of air and lead to rich operation and poor performance, the reed valves need to seat perfect or scavenging pressure will force fuel and compression backwards through the intake so make sure the reeds seat perfect. Compression test is never a bad idea for diagnosis and future reference if you have the equipment. 👍

What octane fuel? If in doubt drop the main jet needle one notch and test ride it 👍

HEY EVERYBODY RUNNING 80-1 AND PLUG IS WET ALMOST LIKE ITS RICH. IS THIS NORMAL?

Thanks, I'll try the water test to make sure. Yes, know the brakes will be DOT It's just the clutch I wasn't sure about 👍

I suspect you are looking at DOT fluid; another test to try, mineral oil does not mix with water, DOT fluid mixes with water very easy. Only your clutch hydraulics would use mineral oil, brakes will always be DOT fluid.

As title says, frame number suggests it's build is march 04. The master cylinder tops have been changed for aftermarket ones so can't go by the colour of the top. I had the Idea to take the top off and dab a cotton bud into fluid and rub it onto a painted surface (not on the bike 😉) and it took the paint off, so assuming I have DOT4 and not mineral oil unless that strips paint as well 🤔 Want to top up master cylinder and fit a repair kit. Cheers Tim

Thought I'd been a member on here before, but obviously not 😂 Got a 2004 Gas Gas TXT 200 Pro

GasGas had the same forks at the time, so you could look at them also.

If you can actually find a seal and piston kit they are quite expensive usually , it may be better to pay the extra and buy a rear master made by AJP/BRAKTEC . Trials people refer to this as braketech for some reason but if you go to www.braketech.com you are not going to find what you want www.braktek.com is the real name of this company. Best wishes Alan.

I found their site earlier today and got sort it out .thanks

If you go to The Hell Team's website (www.thehellteam.com) then go to TECH SUPPORT / GASGAS INFO then there is a folder called CHASSIS NUMBERS EXPLAINED with all that info, for all GasGas years. Tonnes of other good GasGas info there as well. Parts manuals, User manuals, service info, etc etc. https://www.thehellteam.com/technical-support/gas-gas-parts-and-service-manuals

@Tr1AL Thanks again! That is super helpful the rear brakes need done (unfortunately I think the rear master need rebuilt/replaced too)

@excess You probably saw that your shock is not a OLLE but the SACHS ZF that is a standard on a TXT pro looks like they saved money with a cheaper finish on the body.

Lampkins (Beta UK) did have a complete spare parts order system on line for all years and models. The UK mail system must be very good because I could frequently get parts delivered to the US in one week which was faster than most US suppliers. In the past, shipping cost was comparable but a few years ago shipping went up 2x or more so I have not used their site lately.

Formula brakes /clutch master cylinders & slaves are no longer available mass production and parts are hard to find although there are some bits still around if you search hard enough I recently found a front calliper seal rebuild kit while searching for something else. Brake pads are easy to find GALFER or GOLDFREN make them to fit. Go to www.rideformula.com . Best wishes Alan. PS Formula make the TECH branded trials forks that are now used by a lot of Trials moto manufacturers.

Thank You! I've got it in my garage now so I'm able to dig a little deeper now. I really appreciate the help! Runs pretty well. Needs some maintenance

The Canada-France relationship is still intact, despite the attempts of the orange guy. Please hook me up as I regularly move things along this route. It may help Norm's economy a little... Thanks. Cheers... Paul

Fortunately I am Canadian 👍 which means shipping is expensive, taxes are high and my money has low value (at the moment). I'd hook you up with Norm the OSSA god if you lived closer, he only lives 2 or 300 kilometre away and you are correct I am lucky to have lots of good rider friends 😎 several are motorcycle dealers and that helps too.