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Swiss

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Everything posted by Swiss

  1. Swiss

    520 chain vs. 428

    Hey Guys, Old School ideas here says that a racing 125-150-200cc Thumper needs a good 520 chain set-up. How are the CRF150-RBs doing with the smaller 420 chain? Is it a frequent replacement item or are they lasting behind the higher hp of the little 150R bikes. Swiss
  2. Has anyone got a spoke thread rolling tool that can help out a fellow biker? He got a set of spokes built by RAD and asked for them to be about 1/4" longer than required. Well, they did that but kept their standard thread length. When he built the wheel he found of course that the threads stuck out the top of the nipples AND that there wasn't much thread engaged because of the normal thread length passing through the nipples. So, the threads are rolled and not cut so he can't use a die to extend them down the spokes. RAD says that they don't want to fix the problem so he is stuck. He can cut the tops of the threads off the ends of the spokes but is still worried about only having about 7-10mm of threads engaged inside the aluminum nipples. Swiss
  3. Swiss

    Wide Ratio Trans?

    Since the CRF150RB engine seems to be fairly unique in size and design (other than the larger 250 and 450 versions) I don't think that there would be any options for gearing a wider ratio transmission? Just thought that I would throw it out there to see if anyone had even thought about parts that might swap in. There seem to be a pretty large number of riders that use the bie for riding trails and off-road so a little wider range of gears would be nice. Swiss
  4. OK Guys, Seems like many people like the idea of lightweight Titanium and Carbon Fiber parts and such but are shocked by the costs of the trick lightweight parts on the market. I just finished making some Titanium Studs and Bolts for my Vintage Honda XL350. Was it worth it? Probably, the cost wasn't too bad EXCEPT for the fact that it included the lathe that I bought (at a bargain price) a couple of years ago and an adjustable Ti-Nitride Tap/Die set for finish cutting the threads etc... Carbon Fiber, that will come maybe next year when I do some additional experimenting. Thing is that I should have done this 20 years ago and not waited. I love MAKING bike parts for my bike! Unfortunately I didn't have the lathe 20 years ago, 6AL-4v Titanium wasn't available by the pound 20 years ago and the Internet hadn't evolved into the information resource that it is now. What I am telling those of you who LIKE building your own stuff, get out there NOW and do it. Under $25 per pound for Titanium that you can make axles and engine studs and such out of. Of course, this applies more to a person like me who keeps the same bike around and running for 30+ years and not the guy who will swap out his 2 year old MX bike because it is out of date and something NEW is on the market!! So anyway, I just finished a Titanium Stud/Bolt set for my Vintage 35 year old engine! Not much news for the buy at the Dealer the latest and greatest guy, but a big deal to me since I couldn't afford to BUY a Titanium Stud/Bolt set for my engine 30 years ago when they were actually on the market from KSI Racing! Swiss
  5. Here are a couple of trackside pictures of Joe Martin's XR200 based race bikes. Really well put together and top level work on them! Joe did well on both bikes are the Phoenix Vintage races last weekend. Bultaco framed short travel Vintage bike. Suzuki framed longer travel bike, Joe says this one handles GREAT! Really enjoyed being with Joe and Michael and his TT540 Yamaha at the races! Good guys both! Swiss
  6. Swiss

    XR200R Modification Guide

    Most of these last pages should be in the regular topic listings, not in the modification Guide which for already tested and specific changes/mods. Questions belong in the forum topics guys! Don't clutter up the Mod Guide! Swiss
  7. Swiss

    New Trackmaster 125 chassis

    Terry, Some thoughts.. Not to be critical but to get some specifics. First I would like to know the actual weight w/oil-no gas. 180lbs.. Bathroom scales front and rear would work. What is the frame weight? Swingarm weight? Bike looks good but built just like the old Trackmaster with extra frame space for bigger engines, not specific for the 100-200 engine. Old SL/XL/TL brakes aren't very effective, I know I rode with them in the day and did all of the recommended mods to try making them better. YZ wheels/brakes are much better parts to use. On the engine/exhaust, the headpipe is awful long for a race engine. Should tune for mid-range rpms with the headpipe and then down to idle with the nice meg... Great for riding Trials but most small bore MX riders like running their engines in the upper rpm ranges which means a short headpipe and then the meg. Back to the frame, I HATE bolt on footpegs. It speaks one of two things. Either the right peg location hasn't been worked out and you need to adjust location or adjustability for different sized riders. Lower for taller riders etc.. But with this frame you can't go any lower, they are at the bottom of the cradle tubes already. After all of that, bike looks nice and period/vintage. Swiss
  8. OK, current topic about Best Offroad Boots preceeds this one. Comment was made about one pair of boots being really heavy and another was much better. But no specifics. It shouldn't take long to fill in the details on most currently available models and maybe some older models also? Good time to start a simple database. 1 What brand and size are your boots? 2 What size are they? 3 What do they weigh? Clean without last weeks mudpack! 4 Are they smooth soled MX style or Lug style offroad? 5 Are they easy to walk around in? 6 Did they break in easy? Thanks, Swiss
  9. Swiss

    What do your boots weigh?

    OK Guys, we have 1 weight and comments for the Forma boots. I am sure that there are more of you out there that have a small scale in the shop. Guessing weights isn't very helpful and pretty inaccurate so those of you have have a scale, check it out and report what you find. I might as well add my old boots to the list. Thanks, Swiss 1 What brand and size are your boots? Alpinestars Tech4 2 What size are they? 11 3 What do they weigh? Clean without last weeks mudpack! 7lbs.12oz. for the pair/3lbs. 14oz. @ 4 Are they smooth soled MX style or Lug style offroad? Semi-smooth, cuts in sole and heal. 5 Are they easy to walk around in? Fairly comfortable but heavy. 6 Did they break in easy? Couple of rides.
  10. Finishing up the final rebuild on my 38 year old bike. Got to pull a few pounds off and make it easy to ride for an old man!
  11. Swiss

    XR200R Weight Reduction

    For those last 2-3lbs. of weight loss for your bike plans! http://www.de-tris.com/ Swiss Yes they are lighter than the CRF and KTM mini-bike conversion wheels... Only about $2000 for the set if I understand their pricing!!
  12. Swiss

    Zrxers' tt600

    Ha!Ha! Interesting, fully built 600/686cc engines put out over 70hp. Can make for some really FAST Slugs! Swiss
  13. Swiss

    Project needing an XR200 bottom end.

    Sounds like an EBay search is in order. Usually something happening there. Good luck with your project. Swiss
  14. Come on Guys, it can't be that hard getting under 200lbs... Borile evidently did it with a Chinese 230cc electric start engine! Which would be the equivalent to the CRF230 Honda. Of course his was using more street oriented suspension, but the CR85/CRF150r forks would be as light as the 40mm units that he used. Same for the disk brakes off the small Hondas... http://www.twowheelsblog.com/post/10485/borile-multiuso-a-unique-multi-purpose-bike-from-Italy Check out the offroad model with aluminum uni-body tank/frame in the photos. Looks like maybe a bigger 250cc engine in that one. Swiss
  15. Swiss

    183 lb XR200

    Come on Guys, it can't be that hard getting under 200lbs... Borile evidently did it with a Chinese 230cc electric start engine! Which would be the equivalent to the CRF230 Honda. Of course his was using more street oriented suspension, but the CR85/CRF150r forks would be as light as the 40mm units that he used. Same for the disk brakes off the small Hondas... http://www.twowheelsblog.com/post/10485/borile-multiuso-a-unique-multi-purpose-bike-from-Italy Check out the offroad model with aluminum uni-body tank/frame in the photos. Looks like maybe a bigger 250cc engine in that one. Swiss
  16. Swiss

    XR200R Weight Reduction

    Come on Guys, it can't be that hard getting under 200lbs... Borile evidently did it with a Chinese 230cc electric start engine! Which would be the equivalent to the CRF230 Honda. Of course his was using more street oriented suspension, but the CR85/CRF150r forks would be as light as the 40mm units that he used. Same for the disk brakes off the small Hondas... http://www.twowheelsblog.com/post/10485/borile-multiuso-a-unique-multi-purpose-bike-from-Italy Check out the offroad model with aluminum uni-body tank/frame in the photos. Looks like maybe a bigger 250cc engine in that one. Swiss
  17. Swiss

    CRF 150/230 Project Builds

    It never hurts to have a reference weight. If for no other reason than to have a starting point for weight loss. The 2 wheel method is fairly accurate and will give you a good basis not only for overall weight but for bias front/rear. Swiss
  18. Easy check for stretch is to put the chain on the top sprocket. Then lift in the center of the top sprocket. If the chain is worn out it will lift a bit off of the sprocket, if it is not worn then it will only lift a tiny bit with the chain wrapped around the sides of the sprocket. You can do the same with a rear drive chain. Just grab it at the back of the sprocket and pull out. It should stay pretty close to the sprocket. If it easily lifts from the sprocket then it is worn out.
  19. Swiss

    1971 Honda sl 125

    You can drill out the rubber and then if there is a little bit of the lip sticking out the top you can catch it with a good chisel and collapse it from one side.
  20. Swiss

    CRF 150/230 Project Builds

    So Steve, currently what does it weigh? Without gas?
  21. Swiss

    No spark XR200R. Maybe stator issue?

    Yes for both questions.
  22. Swiss

    No spark XR200R. Maybe stator issue?

    I am pretty sure that the wiring resistance values for the different wires have been posted before. If not maybe Chuck can list them from his records? Swiss
  23. Swiss

    No spark XR200R. Maybe stator issue?

    OK, lets look at this from what you have said. You "fiddled" with the stator wires and it fired right up? That could mean that you have a bad wire coming out of the stator OR you have a poor connection between the stator and the wires coming out of it. Fiddling around with the stator wires won't do anything directly to the stator except for making or breaking a connection either in the wires or the stator connection. I suggest that since your local shop doesn't seem to want to work with you that you find a local electric motor repair shop. Take your side cover off with the stator in it and take it down to him. Ask him nicely if he could check it for shorts or a broken wire going into the stator? Tell him that you aren't sure what you are doing and would appreciate his help, be honest. Take the recommended resistance readings with you so that he can compare them with what they should be. Thank him nicely for his help and if he doesn't ask, give him a few $$ for his trouble. Now, assuming that you don't have a local electric motor repair shop, try the local shop class at the high school or community college. They should all be willing to let one of their students learn how to troubleshoot something simple like a stator coil system. Again, take the right resistance numbers with you when you go.
  24. Swiss

    SL 125 AHRMA Project

    You can always drop me an email at swissscf@beyondbb.com My first race bike was a '71 SL 125. Did almost everything to it including a frame. Swiss
  25. Swiss

    SL 125 AHRMA Project

    It is simple, if you want it to go FAST then pay someone that is good to do the porting. And being "GOOD" on the newer 4-v watercooled heads doesn't make for being really good on the old air-cooled 2-v heads. The better Mini-bike tuners could probably get more out of it than the big name late model tuners. Doing it yourself doesn't mean that it will be done right or be fast. I once stopped by a shop in Washington state where the guy had made a name for himself porting and building fast racing XR75 bikes for the mini-bike classes. He showed me his "scrap pile" of heads behind the counter that were heads that he learned how to make them fast with! There were probably 50+ heads in boxes sitting on the floor. By the way, he also Track and Dyno tested everything that he built! His work was worth the $$$! Swiss
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