Full Tilt CR250 Build - MXA Two Stroke Hall of Fame

Lightning78 wrote:

Yes! Like others this is great to know.....so Im curious, I see the specs on motor as: MABUCHI RS-365SH 6-20V DC MOTOR 19400RPM 250MA and Operates...

Yes! Like others this is great to know.....so Im curious, I see the specs on motor as:

MABUCHI RS-365SH 6-20V DC MOTOR 19400RPM 250MA

and

Operates on 18 VDC nominal - Recommended operating voltage range 6VDC to 20VDC - No load speed is 19,400 RPM - No load current: 220 mA - Full load (maximum efficiency @ 18VDC) performance characteristics: Speed: 16,060 RPM, Current: 1,060 mA, Torque: 72.2 g-cm (7.09 mN-m), Power output: 11.9 Watts - Stall torque: 420 g-cm (41.2 mN-m) - Stall current: 5.10 Ampere - Can be operated in either direction - Dimensions (not including shaft): 1.28" long x 1.09" diameter - Shaft dimensions: .35" long x .09" diameter - Features 2 threaded mounting holes (JIS M2.6x0.45)

I used to race RC Cars extensively and my thought process here is relating this to an aftermarket high performance steering servo and how I was able to drastically increase the turning and handling performance by getting a higher speed & higher torque servo than the standard ones that came with my RC controller ..... What Im wondering here is, I saw a few motors that would fit in the same dimensions yet had a slightly higher RPM rating and torque numbers were increased as well, could one put in a replacement servo motor that was faster, had more torque, more efficient, responsive to power/signal input from the TPS or CDI possibly making the RC valve react quicker and sharper?

In my own wacky ass theory an owner of the RC valve equipped CR's could turn the bike into more of a brute hitting/running beast like the 92-01 engines as the RC powervalve would function more like a perfect version of the mechanical one it replaced, instead of a linear open/close it worked quicker letting the gasses build up just a little bit more before it opened, and opened at a faster rate releasing the trapped exhaust gasses faster, they should/would be a little more compressed and release with more of a burst and create a better hit in the engine when it transitions from mid to top end power?

Anyone else think this would work? Would it allow the engine to make better use of the oversized crankcase volume? I.E. the RC-pv stays closed a little longer allows the exh gasses to build up slightly more in the engine and then opens faster releasing them, assuming the upgraded motor has more torque to pull the valve closed to make a much better and consistent seal of the butterfly valve when closed? Same would apply for when its fully open.

Or am I completely out to lunch on this thought?

Matt Fisher wrote:

Nice work. The electronics look so "pedestrian" with the trick CF bracket and TI fasteners.

Reefer Sutherland wrote:

Dude, get ahold of whoever is the AMA inspecting official, and put a guy like Collier on this at Glen Helen. Let em inspect the frame...

Dude, get ahold of whoever is the AMA inspecting official, and put a guy like Collier on this at Glen Helen. Let em inspect the frame and whatnot, it might still be legal. 07?

nascarnate326 wrote:

What brand plastic do you plan on using? Do you plan on actually riding this or is it going to be a showcase now? and finally...oil...

What brand plastic do you plan on using?
Do you plan on actually riding this or is it going to be a showcase now?

and finally...oil and fuel for this thing?