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If someone wanted to make their own bike they could buy a Chinese crate engine, build frame and source other parts. There's even a 2 stroke option with electric start with counterbalancer. Engines would probably cost half or less if bought from the source. The horizontal pit bike engines would have a lot of low end grunt. The Chinese even make a KTM 105cc 2 stroke clone engine which would be very light and good for trials if tuned correctly. https://gpxmoto.com/index.php?route=product/category&path=10 http://www.shinebike.com/product-detail-232309.html

Here's a quote from Ian Smith, Oset founder: Financially, lithium batteries are by far the biggest single component cost in the bikes. Ian describes it as: “It’s like buying a bike with years’ worth of free fuel.” Does this mean you need a new battery after a year if you want it to perform the same in December as it did in January? If the battery is good for 1000 charges it would be like buying a bike with 2.7 years of free fuel if you charge it every day. But of course electricity is not free. I suspect Oliver Smith gets a new battery at least every year for top performance. https://electricmotorcycles.news/oset-24-0-racing-2017/

A friend bought one last year used for $3000 and the previous owner bought it new, rode it a few times, didn't like it and sold it. My friend only rode it for about 6 months before his knee injury and now he says the battery is toast and needs to be replaced. I think it needs a new battery every 1-2 years with regular riding. At that rate, it is more expensive to own than a gas bike.

Looks like the same Chinese motor as the GG Randonne. https://advrider.com/f/threads/tenaci-wong-tw200s.1194012/page-5#post-35728112

I had a 305 and the manual was in Italian. Watch out for the skidplate bending and cracking the cases and chain coming off and breaking the case.

Replacing #10 just take off clutch cover and only tools you need are circlip pliers and allen wrenches. Older bikes like my 07 need to split cases to replace shift shaft. If your bike is old you might consider replacing all the seals and maybe main bearings while the cases are split. When I split my 07 I didn't need a case splitter tool.

The crossbar on #10 will break and spin inside the cylinder after a hard hit. My guess is #13 cracked and you have to buy the whole shift shaft assembly #28 Mine cracked after the bike slid down a rock face dragging the shifter upwards. On my 07 the crossbar on #10 is not welded but pressed in. It is like a fuse, your bike will shift if it is good or won't at all if broken. After it breaks you can tap it out and replace it. I found a piece of deadbolt wood frame reinforcer fits perfect and I keep it as a spare.

https://www.ebay.com/itm/Vee-Rubber-VRM308R-Trials-Rear-Tires-3-50-R17-TL-Radial/183216783167?epid=656466914&hash=item2aa8923f3f%3Ag%3A-tkAAOSw3qZa8mot&_sacat=0&_nkw=vee+rubber+3.50-17&_from=R40&rt=nc&_trksid=m570.l1313 My guess is same rubber.

I have a bike that has oil leaking from the countershaft seal. Parked in the garage, I would find a small puddle of oil on the floor. Now I use a triangle stand and park the bike leaning in the other direction. Problem solved!

How much did it cost for the cylinder exchange? I assume it is from Jim. I just had my YZ welded and replated and it cost me $320 with shipping plus $100 for new piston.

Before I open an engine for the first time I look for any evidence of someone opening it up before me. Rounded bolts, scraped off gaskets, marks from removing seals, etc. I doubt a backwards piston would last 14 years. It will cost about $300 to get the cylinder welded and replated plus the cost of new piston. If you have any up and down play on the rod you should have the crank bearing replaced and while your doing that, replace main bearings and seals. Another $500 or so. Up and down play on the rod will toast a new top end, side to side play is normal. I guess totally rebuilding the engine will cost about $1000.

I remember when you were having Ducati ignition problems you were doing some weird wiring experiments, bypassing components. I wonder if this was the initial cause with improper ignition timing? Usually trials bike top ends don't need to be replaced even after 10-15 years for the average rider with proper maintenance and the usual putting around. I never hear of trials riders installing hour meters and talking about new rings or piston after X amount of hours like I hear enduro and mx riders do.

My radiator guard extends beyond the surface of the cdi and the cdi is not securely mounted. Sort of a breakaway mounting. I plan on making a plastic cover for it. The new Betas, Sherco, Scorpas have the cdi mounted exposed in a lower position which might be better but a mounting bracket needs to be made. They have been doing this for a few years now and maybe it is to keep it cooler but it looks to be in a vulnerable spot.

20171218_170129 It is attached with foam tape and a zip tie on an aluminum radiator guard I made. 20171218_170141 The rectifier with a heat sink epoxied on.

The Kokusan swap is the best solution and mine has been working fine for a year and a have since I stopped using Ducati. Except this summer the rectifier went out, another cursed Italian part. I replaced it with this: https://www.ebay.com/itm/TRIUMPH-NORTON-BSA-ROYAL-ENFIELD-ETC-SOLID-STATE-RECTIFIER-PN-99-9882-/401454218290?hash=item5d78893c32 I'm concerned about exposing electronics to heat so I mounted the CDI on the left side behind the radiator, next to the fan and added cooling fins on the rectifier and mounted it behind the numberplate. Not so worried about the coil so it is behind the steering head.

I bought a complete Kokusan system from trialsbikebreakersuk ebay store for $370 in May 2016. Earlier that year they had another system they sold as a kit and around that time you could also piece together a complete system. Now they seem to have dried up but you could keep checking. You could get one here if he still has it. I have three Ducati regulator/rectifier boxes that you can have for free. Also have the flywheel, 2 coils, 2 pickup coils and stator.

I tried this but it didn't work for me and I switched to Kokusan. Whenever the spark went out it was always the regulator/rectifier box so I guess if you can find the right diode or whatever you can solder in a replacement.

This guy rides it amazingly well and it sounds modded out. I believe it uses a Yamaha TTR motor so spares should be plentiful for the motor.

https://archive.org/web/ copy and paste url click highlighted calendar day

I have the same year bike and replacing this part fixes the no spark or no fan problem. http://www.splatshop.co.uk/gasgas-rectifier-regulator.html Except that I had to replace that box 3 more times over the years when the spark or fan wouldn't work so I switched to a Kokusan ignition.

The old content from gasgasusa.net is still visible here Some useful info for older models. Using the Wayback Machine, you can go back in time and see a treasure trove of GG info.

Part uno

Click here Jim took down all his videos that have GG branding on it. This is the second half of the DVD that came with my 07 pro. He has a good video on youtube about replacing main bearings if you decide to do it while the cases are split.

Colton Haaker also started in trials.

What's the deal with Smage and Frexia being tied and Smage gets the win because he dabbed first? I never heard of that rule before. Should have been a rideoff like the sudden death playoff they had at the Masters golf the same day.