| Author | Message | ||
     Vonsliek |
ok .. want to lighten up the xb12r for track, but carbon no option & have fitted racekit mufflier already. obviously lights & reflectors .. done .. so, what can i do?? thanks. | ||
| Bud |
mirrors, pas. footpegs, toolkit, leftswitch ass.( clipon ) complete headlight ass., sidestand ( bring a support )..don't eat heavy  | ||
| 1stbuell |
Replace battery with a smaller one, fiberglass race fairings (Sebimoto) much cheaper than carbon but very light. | ||
| Slaughter |
I hadn't taken too much stuff off. Carbon isn't worth your money. IF weight is a really big concern, you CAN strip out the electrical system and build it as a total-loss - BUT with the generator and starter motor out and a smaller battery, even though you can save maybe 12-15 pounds, you might find that you miss the convenience of self-starting! (I haven't done it yet) You'd have to build or buy a bumpy of some sort. | ||
| Diablobrian |
You can also get an aftermarket rear subframe. Ours came from racingmotorcycles.com. Total loss is a big gamble. A lighter rear wheel is another way to lose a few unsprung pounds. You can also shave some mass from your rear brake rotor. definitely get a rear stand and lose the kickstand (most race organizations require it) If you really get down to shaving ounces you can cut down any bolts that are a little long, or replace them with titanium or aluminum bolts depending on what kind of load they are under. This gets expensive really fast, and/or very time consuming. | ||
| Slaughter |
We're designing a subframe-less seat which can support the battery. No schedule for testing. Don't know if we'll even try selling it. After wadding up a few of these bikes, I think it could be a real advantage to have a seat/subframe combination that would break off cleanly in a crash. | ||
| Vonsliek |
does the subframe cause twisting of the main frame if damaged in crash? what do u guys think of removing some of the subframe rearward of the seating position - where the pillion wld normally be? i am guessing the main areas where weight is carried is w/in the powerplant - crank/flywheels/legacy btm end basically & trans?! anyone shaved their flywheel/crank? what kind of costs are involved in this? quickshifter .. anyone tried this? will velocity stack for stock f.i. add much in terms of acceleration - esp. coupled w/ lightened flywheel/crank? handling w. extended s/w, lightened btm end & chain must be totally different? since i know xb12r will not really get any faster - necessarily - i am trying to find ways to make it at least hammer thru the gears fast enough to keep water cooled bikes at bay on straights. the most *I* can afford to lose thru hard cardio wld be 10# - i am 5'9" & 170# & stocky enough, for the wag who suggested losing personal baggage! i agree the torque is already mad enough, its the spin up i guess i am tying to improve on. | ||
| Diablobrian |
lightened flywheel assembly is $500 from a non-sponsor site. I'm sure you can find it. You can't have the machining and dynamic balancing done to your existing crank for less than that. (Message edited by diablobrian on June 11, 2006) | ||
| Diablobrian |
The rear subframe I mentioned earlier is made of a lighter gage tubing than the stock piece. I'd be interested in seeing the monocoque seat Slaughter mentioned. I have not heard of the rear subframe damaging the frame of the bike in a crash. | ||
| Slaughter |
The subframe will tend to break the mounts on the frame where it attaches. Good welder can easily fix those by cleaning them up and welding tabs back in place. You still have to replace the seat and subframe though. Don't think the cost of a seat/subframe combo would be much more than a seat itself. I've had a couple sponsors express interest if I got it tested. We usually don't wait more than a couple months for a crash test. | ||
| Diablobrian |
If you're not crashing you're not racing! or at least not as fast as you can. | ||
| Mountainbiker90 |
I'd recommend a lighter set of wheels and a chain conversion. the belt really robs some power. | ||
| M1combat |
"the belt really robs some power." I know it's good to go with a chain for the track anyway but... Tech please... | ||
| Diablobrian |
The belt doesn't rob power. The real advantage of the chain is easy final gear ratio changes. The chain is actually heavier than the belt even with a 520. | ||
| M1combat |
Understood... Just wanted to see if he would try to back that up at all... | ||
| Vonsliek |
yeah .. that was lame .. chains are known to weigh & are inherently *soft* in delivery of that nasty stuff called TORQUE! |
