ninjette.org - View Single Post - Ninja 250 Compressed Natural Gas Conversion

jkv45 · October 23rd, 2013, 01:52 PM

Interesting concept.

Why would you "need" to go with high compression pistons? I wouldn't think you would have to. If the Ninja is in good running order I would work on getting the CNG to meter properly and only after that would start disassembling the engine to make mods. Why do you want to increase the compression that much? The Ninja engine can easily take the amount of power increase you'd get from the higher compression.

A local Taxi company has been running it's old Chrysler cabs on Propane for decades. Have you considered both CNG and Propane? Propane has more energy than CNG (you'd need to carry less), but I'm really not very familiar with either as a fuel for IC engines.

October 23rd, 2013, 01:52 PM	#2
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	Interesting concept. Why would you "need" to go with high compression pistons? I wouldn't think you would have to. If the Ninja is in good running order I would work on getting the CNG to meter properly and only after that would start disassembling the engine to make mods. Why do you want to increase the compression that much? The Ninja engine can easily take the amount of power increase you'd get from the higher compression. A local Taxi company has been running it's old Chrysler cabs on Propane for decades. Have you considered both CNG and Propane? Propane has more energy than CNG (you'd need to carry less), but I'm really not very familiar with either as a fuel for IC engines.