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The kit is made by S3 parts in Spain it has 1x clutch steel plate 1.6 mm thick , 1x diaphragm spring and a adjustable spring support ring www.trialworld.es has them listed at 99 Euros as a TRRS CLUTCH IMPROVEMENT AND SMOOTHING KIT. S3 is a company that for decades has made all the motor cylinders for nearly every Trials bike made in recent history.

Hi I am looking for some help with the electrics on this machine which I purchased as a pile of parts. The machine is a 2001 model I am looking for some guidance on the electric fan circuit and cant find any drawiings on this, no wiring was with the machine. I have what appears to be a small black box with 4 wires and a small 3 legged IC, which i assume that this could be the ac dc converter and possibly a voltage regulator and would appreciate some help on how to wire these components, The Stator has 3 wires one black and 2 orange There is also a small blue 2 terminal round box fixed to the fan cowling, can anyone identify this unit Regards Dave G

Hi I am looking for some help with the electrics on this machine which I purchased as a pile of parts. The machine is a 2001 model I am looking for some guidance on the electric fan circuit and cant find any drawiings on this, no wiring was with the machine. I have what appears to be a small black box with 4 wires and a small 3 legged IC, which i assume that this could be the ac dc converter and possibly a voltage regulator and would appreciate some help on how to wire these components, The Stator has 3 wires one black and 2 orange There is also a small blue 2 terminal round box fixed to the fan cowling, can anyone identify this unit Regards Dave G

Yes, on both counts. (I would not have survived this repair w/o Jim.) In fact I let them sit bathing in oil for a few days on the bench while I pondered the situation and researched the topic. It seems that, like Nigel & I have found, that these brngs are REALLY tight right out of the box so I'm proceeding w/ the reassy w/ skepticism but it does seem like the more I move them the better they feel. Was just hoping that Nigel would reply back w/ positive vibes to keep me motivated. Edit: Oh wait, I am using the old style brngs, not the low friction versions. (I did not know the diff when I ordered)

Yeah - that's the one, but the best shot in the video was w/ the cases split, and I was having trouble believing that it should be free standing and not up against the other case half for support. Well, I tried the position that I felt would be supported (max clockwise) but then it rubbed against the K/S shaft bushing, so I rotated it back, even more CCW beyond the photo and all seems to work well now, so there I have it - Jim (and you) are right! Now I'm a believer! 😉

Yes but they have done the research on what works. Its not a TRS kit from what it says. I've emailed them to see if they have the other two parts, spring and friction.

Moto Moto Big and chunky

There are an awful lot of Trials shops all around the world , you probably will find one of them has some old stock sat around.

Did you lubricate the Xiu bearings before fitting them , I mean the bearing races not the bearing housing , Have you seen the Jim Snell video.

@PapaWheelie The video titled 'Jim Snell-USA-GASGAS TRIALS ENGINE REPAIR , PRO KICK-START SYSTEM' that is 11.09 mins long shows very clearly where the kick stop is positioned in various images , starting at 4m 46s. It is clear to me how it should be fitted. Perhaps you are seeing a different video?

Trail , Trial.

Hello everyone! I’d like to share my choice of tyres for the Honda Transalp 750. I used to have a Yamaha FZ6, but I fancied switching to a proper adventure bike. I looked at various options and settled on the Transalp 750 – I’ve always liked it for its balance of power, comfort and capability. I wanted a versatile bike that I could ride comfortably on the motorway for long distances, yet still handle light off-road terrain gravel, forest tracks, and dirt roads without any issues. So I could get out into the countryside, rather than just pottering around town and on the motorway. The Yamaha FZ6 wasn’t comfortable on gravel and dirt: the low ground clearance meant the narrow tyres got stuck, the suspension bottomed out, and the handling became twitchy. Of all the tyres I considered, I went for the Metzeler Karoo STR (Karoo Street) My experience: On tarmac, the tyre performs excellently: it offers good grip on both dry and wet surfaces, and handles corners and high speeds with confidence. It’s slightly noisier than pure road tyres (especially on the motorway), but is perfectly comfortable for its class. In terms of handling and stability, it is one of the strongest options among all-round tyres. On dirt tracks and light off-road terrain, the Karoo STR performs admirably: decent grip on gravel and hard ground, better than that of pure road tyres. The motorbike feels noticeably more confident and stable when leaving the tarmac. However, this is not an aggressive off-road tyre in deep sand or wet mud, it clogs up more quickly and is outperformed by more ‘aggressive’ models. The result is a good balance that suits my riding style perfectly: 70–80% tarmac and 20–30% light off-road. It’s comfortable on the motorway, and when I want to head off-road, the tyres let me do so without any real hassle. What else I considered: The Continental TKC 70 Rocks is an excellent all-round tyre with slightly better off-road capabilities. But I preferred the Karoo STR for its road handling and comfort. The Michelin Anakee Wild is very strong off-road, but for my use (non-extreme off-road) it seemed a bit over the top it wears out faster on the road. Dunlop Trailmax Mission very versatile and durable tyres, with good grip on tarmac. They’re not bad on dirt either, but according to reviews, they sometimes fall short in mud and self-cleaning. Conclusion: Choose tyres strictly according to your riding style. If you need a comfortable option with a focus on tarmac, but with the ability to handle light off-road terrain comfortably the Metzeler Karoo STR will be a good choice for the Transalp 750. I hope my experience proves useful to someone. If you have your own experience with these tyres or any objections, please write in the comments – I’d love to read them! Happy riding to all and have a great season!

140g lighter. thanks to this upper triple clamp. By examining the components of the first-generation of 4RT models, we can see how much Montesa did to offer a 4-stroke with a weight similar to the 2-stroke. Approximately 3.5kg are saved this way. (Frame/wheels/triple clamps, etc.) The handlebars are 5mm further forward and 6mm higher with the 4rt upper triple clamp. So, I swapped the 5" handlebar with the same Renthal 4.5". It's perfect.

I'm working on adapting a Sachs shock absorber. I'm having a rough clevis made, which I'll then machine on a lathe.

I've replaced the broken nylon part with the metal one, but not sure where to position it. I've watched Jim Snell vid (thanks Jim, hope your vids will live forever), but it's still not clear. Anybody here know? After watching the vid, this position looks like what Jim says, but my gut feeling is that it should rest up against the case to help support it. (slightly more clockwise that the attached pic) TIA

Hey Nigel, Tell me you were able to re-assemble and find happiness, as I am EXACTLY where you were at the beginning of Feb. My story is your story, 3 months later. - Daren

Well cash flow issue has finally eased and a trial yesterday had me thinking that I must order a kit. And wouldn't you know it? Out of stock. Hopefully they do another run.

The ID of the flywheels for Sherpa Ts with original points FEMSA ignitions are all the same. The flywheels on different Sherpa Ts are different weights and this is achieved by using different materials for the body of the flywheels. Light ones are cast aluminium and heavy ones are cast zinc. There are quite a few different modern electronic ignitions available to suit the Bultaco Femsa flwheel and some have the stator coil position adjustable to minimise the magnet/winding gap. However I have recently fitted two ignitions from In Motion on Bultacos and neither required any sort of adjustment to work well. i did not measure the magnet to stator coil gap on either. It would help you work out what is going on if you post up the flywheel markings or even a photo of the flywheel. Maybe yours had a different type of flywheel fitted before you got it.

Mickeyg - Not entirely sure what your problem may be but you may have introduced some confusion in the title of your query, and possibly the details you supplied to In.motion ;- model 91 is a 250 Sherpa, 350 would be a model 92 (for bikes of same age and model range.) Femsa original equipment for the two bikes used different weight flywheels, although I had always thought they were similar (identical?) internal diameters. More detail required - pics. possibly ? Ah, I see you refer to Model 92 350 in your very first post............... so which is it ?

Hi everyone I have a question to ask ? Are there different size magneto,flywheels ( internal),I ordered an electronic ignition system from in motion to replace my FEMSA ignition system,I have not been able to ride for 5 years now and wanted to upgrade to make starting easier. On receiving the parts I set about removing and replacing ignition system as directed only to find on trying to start no spark, checked wiring,plug etc,no spark .on removing everything again I looked at the original fitment to flywheel/ magneto to find the electronic system doesn’t fit anywhere near as snugly hence no electrical connection so no spark

EbC ck 1171 friction plates. Plus spring kit from japan.

Thanks guys, I'll take a further look and see what I can find.

Adapter plate to fit XT660 fan on Trialshttps://www.thingiverse.com/thing:7345885Carb parts organizerhttps://www.thingiverse.com/thing:7345885Sherco silencer caphttps://www.thingiverse.com/thing:7321067Piston ring compression toolhttps://www.thingiverse.com/thing:7292486

i suspect you might have blown the head gasket when it overheated

IRC still do tubed type tyres with exelent grip