SWM

I've managed to source a new piston for my 84 jumbo from Italy, however when it's arrived the skirt is 5 mm shorter than the original. As this will affect the inlet port timing will the bike run or do I need another? The pistons are almost impossible to find.

Here's my Jumbo project. I bought it as an unfinished project. It's slowly coming together. The tank was as knackered as you'd expect of a 30 year old bike, found a guy who polishes them up and he did a fantastic job, Now I need to make up some badges. Thinking of doing it in CAD and having them printed. If any one could provide straight on pictures of the right and left badges I'd much appreciate it. I'm happy to share the CAD file when done to anyone interested

Anybody with a Jumbo when your next playing around with it in the shed, could you take some rough measurements for me please. Mainly the rear axle spacer #17 as per below pic, mine measures 32 mm, I'm trying to determine why my left rear shock splays out slightly towards the bottom shock mount whilst the right appears near perpendicular, also when I measure the shocks from centre to centre across the top mounts I get 233 mm but at the bottom I get 245 mm so definitely some 10 - 12 mm of splaying but I don't know if this is normal for a Jumbo. If it is normal, like a Cota 349/4 for instance, I'm curious why the left shock seems to be doing all the splaying ?

I'm refurbishing a Jumbo 350 and could use a little assistance. The seat was a real mess, repaired poorly with fiberglass and attached to the body work with bits of scrap metal and rivets. I've torn it down to what's left of the original seat and have a plan for reconstructing the base and foam. I'd like to use original style attachment but have no idea what that was. I'd much appreciate it if someone with a Jumbo could shoot me some pics of the seat and side panel attachment configuration. Here's what I have now. Thanks Wayne

As above, can anyone please advise what is the correct fitment? The attached pic is something I found from an old post here on TC. I thought mine came with the bracket attached under the shroud(unlike the pic), I pulled it apart months ago and now I'm not sure. Next time anyone has their Jumbo seat off could you please check and post back here. Cheers.

hey all, I am trying to locate a side stand for an 1983 Jumbo, anyone know where I can access one? Thanks,

About 20% into my Jumbo 350 project when I bought someone else's 85% finished project. I'll finish it first and then eventually get to the original one. Unfortunately I must have mistakenly deleted all my tear down photos and will probably be poking in occasionally with questions. I looked all over the web but can't find a pic of the skid plate rear mount. I got a new plate from Martin which would crash into the engine case unless there are spacers between the rear mount and the plate. I'm figuring about 12mm of space is needed. Is this right? Am I missing something? Any help w Thanks in advance

Anyone know the bearing number? I've put the old one down somewhere and can't find it at the moment to get the number. I have to go to the local bearing stockist tomorrow so if they have some in stock I can get some whilst I'm there.

I have a Jumbo 350 with silver straight yokes. having seen pictures of Jumbos I see the most have Betor yokes as in the later TL320 from 1982 on. I did find a few pics where the same yoke are fitted as in my bike so should be origional ones. Has any one got any information about changes ? Cheers Ian

Hi guys, just a quick hi, not been around for a while....my fleet of Gixers, other roadbikes, new to me Firestorm, track day car & my love of track days at Snetterton has kept me busy from realising my dream as a World Trials 'Chump'. OK, I dug Speedy out of her hibernation and couldn't free off the clutch, no matter what I did. Next weekend tried again and finally got her to free off but with terrible clutch drag. So yesterday (these things take time!) I stripped the clutch down and my gearbox oil was contaminated with water (again) looking for all purposes like she had done a head gasket - as if watercooled - she was that bad. See…

Hello people, can anyone help me locate a kick start lever to suit the knuckle that uses a circlip, it's for a Jumbo but I think any kick start lever for a TL trials bike will fit. Cheers. PS: I've attempted to ask in "classifieds" but I don't get any options to let me write a wanted post, in fact I get no options at all. Any clues as to what is happening there ?

Anyone know a source for rotax kick start hubs(not the lever, the piece that clamps on the shaft)? Mine snapped the other day and I have not had much luck finding a replacement. Is Comeca still in business, they were offering them a few months back, but I can't seem to find them on the web now. Help! Thanks ,Jim

Went to start my TL320 the kickstart is not engaging i am only getting a clicking sound as it tries to engage. Does anybody have any ideas.what has failed.

Does anyone know whether the Rotax motor has a 'stop' on the kickstart mechanism? Mine is the Jumbo but I believe it's the same as the 240/280 motors. Problem has occured in that the kickstart travel/rotation is long and on full swing the knuckle of the kickestart has gone round and punched a hole in the casing. I can't see how to stop this happening. It's never happened before but it's happening now. I've looked at the parts diagram and had the kickstart ratchet and spring out but can't see that there is anything to stop the kickstart shaft continuing to rotate until the kickstart hits the casing. There is no way I can kick it gently enough to shorten the swing to prev…

Hey all. I am trying to free a stick Kickstarter. Martin linked a video for me of how to set it up. But do I need to split the cases to get to it? or just remove clutch and gears? Let me know if you know !

Hi all, I have the following problem. I need 3 x new shocks for 2 x TL320´´s and a 350 Jumbo. I thought they were all 340 mm but Inmotion say they should be 360 mm ? On swm-moto.org data sheet it says 340 mm for all mod. I can remember Martin telling me 340 mm also. I then measured some of my old ones and found that a very early TL320 "Gunaco" I have (which has the old red shocks with the external resevoir on it) are 360 mm. On a 1981 TL320 (which has Marzochi units) they are 340 mm ???

China money has resurrected the SWM name and the company is in an excellent position to build quality Italian bikes aka Cagiva/Husqvarna. Right now they are in the 4t mode in the enduro range but they are posed to get the rights to bmw/husky 2t motors that GG has the rights to now. Those engines are torque machines. With a bit of gear change SWM would have as good of motor as Beta if not better, because of the husky power valve. The rich history of SWM trials heritage and a bit of product demand should encourage the designers at SWM to fab a trials frame. The company is doing the right thing by using the husky factory in Vareese with the husky workers, frame, marzocci/…

Must save at least half a pound..! And add some punch to your bottom end. Cheers Chaps, Motosinge83.

Having recently made a typical barn find, a ´81 TL320, the need for magnesium repair is very obvious. I have done it before and I have the equipment, but when looking at the transmission case I and other parts, I still hesitate. This is not the best castings I have seen and after a long life soaked in oil, it will take some hours of cleaning, blasting, degreasing, grinding and so on before I even order the rods and take my TIG welder out. For example, state of the damage on the transmission side include sveral cracks, holes and worn out threads to deal with, previously "fixed" with bad epoxy and thick paint several years ago, making the welding a process in several steps …

What is considered the best set up for these forks ? At present running 220ml of TQF (approx7w)and works OK, but open to suggestions. I weigh about 13 stones. The fork caps have a screw at the bottom, presumably to release pressure but seized solid at present, don't remember them having this, is it a modification ? Thanks Ross