I'm using grimeca on my159 bultaco build that were sourced from a SWM chassy, they are lighter , I used the same set up on my old beta and all was good, I agree on the yz brakes being good but I think the hubs are big and heavy, my '85 cota wears 1976 CR 125 hubs, they are small, light and powerful, also there is a good selection of brake shoes and sprockets available for the CR.
Good subject starter, I think that until they get rid of the minimum weight rule, (not likely any time soon) advancement seems to have halted, the new bikes are very good and easy to ride, I would like to see electronic on the fly adjustable suspension, this is not something that I would think would appear on a club level bike, MX in the US is kind of in the same boat, development is stifled by competition rules that limit minimum weight and an unfair advantage of a 250cc 2T in the same class as a 450 4T,
I personally believe the factorys could build a more competitive super bike that is extreemly light and powerfull if the rule makers would remove the constraints and allow anything the engineers wanted to try, (like in the old days) trickle down technology will show up on production equipment and in our hands after a few years if it is viable.
It's a series 4 Miller frame, the best in my opinion of the Miller frames, the center of gravity is low compared to the later model high boy frames, it's using a model 92 320 cc engine, it works surprising well, the yokes at modified to allow adjustment of the fork height. A lot of work and planning went into this build, some of the parts I had been collecting for 25 years or more. I got the frame only recently and am happy with the result.
I will be soon, did you ride the Houston event? Will try and make the event in June, I have not been able to ride much since I got the bike back together, it is working surprisingly well, still a few bugs to sort out.
if FIM does it then NATC is always next, I f*%$ing hate no stop, so hard to judge, even harder to ride, we already tried this in the '90's, it made the sport stupid, think I'm done with trials. ...yep mothballing the bikes for now, if its sorted out in 5 years I might try again
its been years but I was thinking mine just spun out with having to hold it, if I remember the beta which had payoli's too , I put the spring in the other fork to hold the damper rod in place untill I could get the bottom bolt out, which some genius had locktighted in place
Seals can get stuck, especially when they have been in there a few years, yes slide hammer action for both sides, may need to heat the aluminum a bit to help loosen the seal, if the fork tube pulled through and left the seal, look at your bushing, it may have damaged it when it went through the bottom washer. Use a couple of tire irons or other flat tool to pry out the seal, take care to not put too much force on the fork leg.
The 123 and 200 are very light, they came right at 173 lbs. The rims and spokes are weak, they benifit greatly from a carburetor upgrade. Fun bikes, easy to ride, almost light as a modern bike, add quality shocks and well tuned forks, its a winner.
flip the rear engine mount over if it doesn't fit, its hard to tell which way it goes unless you mark it when you remove it, sounds like your swingarm is bent?? not sure what you are trying to measure?
Are you in the US or Europe? US its southwest Montesa, UK I think its sanderfords, sammy millers, and ....can't think of it, do.a.Google search and you should come up with.a.few results.
I thought abought different hub and have a nice light weight yz 125 wheel, not what I want, I have fitted the bul with a trick set of grimeca hubs, and am going to stick with that. I also considered a.crossover bar and have a set up with pedal off a mid '70's Montesa, I think It's too much stuff to add to the weight of.the bike. It would probably be the easiest to install. I think I want to stay with a cable, trying to work out mounts, leverage ratios, and the brake pedal itself.
I use Honda motocrosser clutch levers and perches on both sides, there are lots of aftermarket versions that are reasonably priced, the montesa bolted right up, not sure how it is going to work on my Bultaco, I may have to use a different cable, for me the leverage is perfect, the domino levers are to small for my hands and don't have enough leverage
I am looking at ideas to convert my 159 chassy to right side brake, does someone make a kit? I do have a left side shifter, I have studied the 199b set up and figure I could manufacture something that would work, I am handy with a welder and have been working on different designs, I would like to see pics of what others have done to slove this problem before commiting to welding something to my bike
I drove 6hrs. to pick up my 2012 Ossa. I rode it in the dealers parking lot for 200ft. It ran like crap but I figured with some time it would break in and run better. Not the case. It had very little power and ran like it had a restrictor in the pipe. Also like a bike with a carb with the air screw turned all the way in. It stalled very easy.
Junk Torx bolts everywhere. Hard clutch pull.Graphics peeling off.Kickstart would return slowly and sometimes bind. Poorly designed rear brake pedal. Turning radius is not very tight. Air filter system is a pain to service.
omg, what is your dealer telling you to do? does it need to be remaped? or tuned?I assume the turning can be fixed with a suspension setup, have you talked to other riders? surely they are not all like this, I had high hopes for the ossa but am not a fan of fuel injected dirtbikes so I would not own one for that reason, having to have a laptop to adjust the tune to me is too expensive compared to a few dollars worth of carburetor jets, hope it gets sorted out, can't believe they delivered a bike that runs so bad it's not even ridable, I have worked in the powersports business for over 30 years and that would never float in my end of the business
italjet piuma t250
in Italjet
Posted
Yes the engine cases are the same as this ducati