Author Topic: Confessions (Read 9496 times)

citabjockey · « **Reply #45 on:** December 14, 2012, 02:28:15 AM »

I like your attitude and await the results with keen interest. You may in fact do it!

Quote from: Uniflow on December 14, 2012, 08:27:12 AM

You may be right, we are "farting against thunder" but I want to have a try anyway. I like the attitude of one of my workers, " How hard could it be" ? How many times that has got us in trouble!!!
Worst case, I've got an orphan bike only I like, good, no one else will want to ride it.

SachsGS · « **Reply #46 on:** December 14, 2012, 03:14:31 AM »

The big 5 are promoting 4T$ so that's what sells. If they wanted to build and promote a new generation of 2T 125s I'm certain they would have no difficulty selling them as well.

Uniflow · « **Reply #47 on:** December 21, 2012, 07:06:48 AM »

250F with more weight bias on the front wheel?
I've just measured the 250F against the 250T ( cases ) and the T has it's crank 20mm further forward than the F

. Swing arm is the same length. F does have a balance shaft ahead of the crank but that doesn't weigh much. T has a slightly heavier crankshaft. I would have said the T had more weight on the front wheel than the F or certainly not much difference. I believe the difference in feel is the way the two engines deliver their power only.

factoryX · « **Reply #48 on:** December 22, 2012, 05:06:33 AM »

4 stroke dirt bikes steer with more weight on the front wheel while two stroke handle with the rear, this is more of power characteristic than motor placement. This is why four strokes are horrible on loose/harsh conditions. MXA quoted the 2012 yz250f to have road racing qualities for this exact reason. This is why tracks are flatter now than they were in 05.. Another problem is the high center of gravity there for adding more of a weighted feel in turns, this is why we don't have deep berms any more. The whole idea of a twin overhead cam let alone single 4 stroke dirt bike is redonculous. For the evolution of dirt bikes, it sure seems like we're going the wrong way.

SachsGS · « **Reply #49 on:** December 22, 2012, 03:55:29 PM »

Move the engine up and forward and the bike becomes more stable at the expense of turning and move the engine back and down, more "carveability" at the expense of stability. Now look at the location of that huge, "cukou clock" 4T cylinder head - as high and far forward in the frame as can be possible. Fast forward to the Husaberg "L" motor and the Yamaha rear slant motor (and associated aftermarket engine relocation kits) and maybe the 4T crowd is looking for a "lighter feel" and better turning, RMs and old Maicos they ain't.