gavin Posted July 1, 2005 Share Posted July 1, 2005 ive posted about this bike elswhere on here in the past, but ive finally got it running now. just to remind you all, its a 1989 TZR125 2RK fitted with a 1991 CR500R motor, as you see it it weighs 90kgs, and puts out about 60bhp at the rear wheel. with the fairing and lights its going to weigh about 98kgs wet. compare that to an R6.....170kgs and 100bhp. http://homepage.ntlworld.com/gavin.prior/tzr500/tzr500a.WMV its running 14/30 gearing....thats NINETEEN TEETH LESS than standard on the rear....yet it still pulls cleanly from tickover and wants to wheelie like a mad thing when it comes on the pipe. top speed in first is about 60mph.....and ive got some software that predicts 11s quaters and 132mph top whack. with a 16t front it should top 140mph. and the vibes arent at all bad, notice im not even wearing gloves in the vid...... also see how it lurches sideways on the side stand when i blip it.....the torque is amazing! some pics with its posh clothes on... Link to comment Share on other sites More sharing options...
Moderator YamaHead Posted July 3, 2005 Moderator Share Posted July 3, 2005 Gavin...... That is such a Cool project! Being as light as it is, I bet that beast goes like a Raped Ape when it's on the pipe! Nice Work! Link to comment Share on other sites More sharing options...
Admin Alex Posted July 5, 2005 Admin Share Posted July 5, 2005 Bet that must surprise a few people Link to comment Share on other sites More sharing options...
gavin Posted April 1, 2006 Author Share Posted April 1, 2006 well i finally got to gibson exhausts to dyno it, really just a shakedown run to establish a few things: will it hold together? will i be able to hold on at full revs or will the vibes be too bad? will the pipe work as it was designed to? and lastly ( but not so important as will it actually work) how much power and torque will it make? after lots of cursing from trying and failing to bump start it with the dyno (and running the dyno batteries flat ), i resorted to the task of kicking it into life. then derren ( dyno guy) noticed the base gasket was weeping badly, and recommended for the sake of the motor that we called it a day. i thought sod it im here now, give it one more go at kicking it, if it refuses i'll go home and fix it, if it starts i'll take a chance and run it. then it started second kick! the first thing i noticed with it strapped down hard on the dyno was the vibes at the bars were really bad, much worse than on the road, no suspension movement to damp it down. when it came on the pipe the sensation was weird, like having your hands cut off, totally lost all feeling in both hands wearing welding gloves made it better, but it wont be so bad on the road. we were running out of time, and because of fears over the weeping base gasket making it run lean (and losing crank case compression) we only did two runs. derren got the revs scale wrong, so double the numbers to get the right figure! 75.3lb-f of torque (more than an '06 GSX-R 750 :devil: ) and 46BHP, and a reasonably wide powerband. a stock CR500R makes about 49bhp, so not that bad considering its not been set up, its an old motor, the pipe design is unproven and the base gasket was blowing bubbles faster than michael jackson more to come when the tuned top end is fitted and its set up properly! and the pipe works as it was designed to, we were aiming for 9,000 rpm max revs and power between 5-8,000 rpm, so well done mick abbey and everything held together, nothing broke or even complained, except the rear tyre! so not a bad afternoon, i have to set the motor up and find a solution to the vibes though! Link to comment Share on other sites More sharing options...
Moderator YamaHead Posted April 1, 2006 Moderator Share Posted April 1, 2006 That Beast has some real potential Gavin A Real Bonafied Giant-Killer Link to comment Share on other sites More sharing options...
4dl dunken Posted April 26, 2007 Share Posted April 26, 2007 any up date on wether it was all sorted? want to do something similar to my tzrr 4dl Link to comment Share on other sites More sharing options...
Willenium Posted May 1, 2007 Share Posted May 1, 2007 That's a mental bike Should see how it does against your 675. Link to comment Share on other sites More sharing options...
monkeylc Posted May 25, 2007 Share Posted May 25, 2007 alright gavin, just joined the forum, i remember you posting on the 125sportsbike forum when the project was in it's early stages. excellant job mate, you've done it proud...... Link to comment Share on other sites More sharing options...
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