SHELRACING
8th April 2009, 09:34
Had to give back the borrowed fxr 150 motor we had fitted to the Delta :bye: :crybaby:
Due mainly to finacial constraints, prices and availability of second hand motors we just couldn't afford to fit another FXR motor.
What to do then The Delta was certainly a lot lighter without the FXR motor in it. I tried getting old Grandma wobbler to push me round the Taumarunui track for a few laps. but she struggled on the uphill section of the track.
So I picked up a couple of RX 125 motors on trade me, One definately a parts motor, the other almost a runner. A reasonably good motor came out of the two. picked up a couple of different chambers from trade me as well a pair of NSR chambers, and a nice YZ 125 chamber. All this for half the price of a FXR motor.
Motor's fitted, YZ chamber was used. Initial testing done. A horrendous vibration was discovered (briefly discussed in another thread). The problem beind solved simply by borrowing the bar end weights from my Pre-89 400
A couple of minor issues to resolve before the next meeting, but nothing major. Jetting is still a bit off (more mains ordered). Engine front mount, might change the muffler (but then I might not :crazy:)
A question for the engineers
This was discussed in another thread as mentioned before. I mounted the engine using only the 2 rear engine mounts. I left out the front engine mount (although it is made and easily fitted now), it is both heavy and extravagant. My vibration issues have been resolved.
Do I really need the front engine mount ? is it acceptable to run on the just the rear mounts.
Steve
Due mainly to finacial constraints, prices and availability of second hand motors we just couldn't afford to fit another FXR motor.
What to do then The Delta was certainly a lot lighter without the FXR motor in it. I tried getting old Grandma wobbler to push me round the Taumarunui track for a few laps. but she struggled on the uphill section of the track.
So I picked up a couple of RX 125 motors on trade me, One definately a parts motor, the other almost a runner. A reasonably good motor came out of the two. picked up a couple of different chambers from trade me as well a pair of NSR chambers, and a nice YZ 125 chamber. All this for half the price of a FXR motor.
Motor's fitted, YZ chamber was used. Initial testing done. A horrendous vibration was discovered (briefly discussed in another thread). The problem beind solved simply by borrowing the bar end weights from my Pre-89 400
A couple of minor issues to resolve before the next meeting, but nothing major. Jetting is still a bit off (more mains ordered). Engine front mount, might change the muffler (but then I might not :crazy:)
A question for the engineers
This was discussed in another thread as mentioned before. I mounted the engine using only the 2 rear engine mounts. I left out the front engine mount (although it is made and easily fitted now), it is both heavy and extravagant. My vibration issues have been resolved.
Do I really need the front engine mount ? is it acceptable to run on the just the rear mounts.
Steve