Hi agian and thanks for your answers,actually my main question is I need more pull starting out?This is very gutless and I live in Pgh,Pa are and we got hills!!!LOL
I have just gotten the Whizzer and wanta ise as much as I can before snow flies ,so any tips on how to pull pout quicker ?Thanks in advance
Several issues need to be considered before increasing power on the NE-r and Ambassador II. Sadly many [if not all] cylinders on the later edition motors weren't cured correctly. The aluminum is too brittle and the headbolt threads "shear". The bolts continue to work loose and the normal reaction is to assume they are simply un-screwing. Problem is the threads are "lifting" and eventually the threads will pull completely out, and leave a smooth hole. Even heli-coils won't hold because they also need to thread into the cylinder.
If the motor is run too long with out re-curing the aluminum it will develope "hot spots" and can't be re-worked. Although it requires a lot of work, the only solution so far has been to re-cure the metal to make it less brittle. Simply bake the cylinder [valves removed] in an oven at 350 degrees for 3 hours, then let cool to room temperature. This process has worked in about 95% of the cases.
If you want to simply increase the power without a major investment in time, just remove the restrictor, open the hole to match the port and reinstall. if the rear belt is on the larger of the two drive pulleys, move it to the smaller pulley [may need to reverse the pulley on the shaft] and it will allow it to take off quicker.
On some of the later edition NE-r the camshaft was advanced 2 teeth instead of 1 [not sure of the logic employed], it works best ONE TOOTH ADVANCED, and the lifter clearance should be .006" intake and .008" exhaust.
You must also consider the RPM level of the stock motor....... I find the CVT not opening all the way because of low RPMs. If you make a few changes the motor will rev higher and therefore open the CVT more to change the ratios and the additional power will help the take-off speed.
Have fun,
I have just gotten the Whizzer and wanta ise as much as I can before snow flies ,so any tips on how to pull pout quicker ?Thanks in advance
Several issues need to be considered before increasing power on the NE-r and Ambassador II. Sadly many [if not all] cylinders on the later edition motors weren't cured correctly. The aluminum is too brittle and the headbolt threads "shear". The bolts continue to work loose and the normal reaction is to assume they are simply un-screwing. Problem is the threads are "lifting" and eventually the threads will pull completely out, and leave a smooth hole. Even heli-coils won't hold because they also need to thread into the cylinder.
If the motor is run too long with out re-curing the aluminum it will develope "hot spots" and can't be re-worked. Although it requires a lot of work, the only solution so far has been to re-cure the metal to make it less brittle. Simply bake the cylinder [valves removed] in an oven at 350 degrees for 3 hours, then let cool to room temperature. This process has worked in about 95% of the cases.
If you want to simply increase the power without a major investment in time, just remove the restrictor, open the hole to match the port and reinstall. if the rear belt is on the larger of the two drive pulleys, move it to the smaller pulley [may need to reverse the pulley on the shaft] and it will allow it to take off quicker.
On some of the later edition NE-r the camshaft was advanced 2 teeth instead of 1 [not sure of the logic employed], it works best ONE TOOTH ADVANCED, and the lifter clearance should be .006" intake and .008" exhaust.
You must also consider the RPM level of the stock motor....... I find the CVT not opening all the way because of low RPMs. If you make a few changes the motor will rev higher and therefore open the CVT more to change the ratios and the additional power will help the take-off speed.
Have fun,
Last edited:
