So Cal Banshee Posted August 22, 2010 Report Share Posted August 22, 2010 I have a complete rz 350 motor (frozen rod bearings), is anything besides shift forks useable to build a motor for banshee? Want to build a 4mil and possibly use the PV jugs for wider powerband. Any suggestions on what can be used? Have everything - complete motor w/electronics. or should I just fix crank and sell it to get cash to mod my motor? Quote Link to comment Share on other sites More sharing options...
Vintage Smoke Posted August 23, 2010 Report Share Posted August 23, 2010 I have a complete rz 350 motor (frozen rod bearings), is anything besides shift forks useable to build a motor for banshee? Want to build a 4mil and possibly use the PV jugs for wider powerband. Any suggestions on what can be used? Have everything - complete motor w/electronics. or should I just fix crank and sell it to get cash to mod my motor? Most everything is the same with a few small exceptions. i actually have an RZ and Shee engine apart on my bench right now. I got the RZ bottom end from a friend and i am doing some mix and matching. I actually have the two transmissions laid out next to each other as I am using parts from both. Cases are the same although SOME Banshee cases(I believe later Banshee? I saw pictures of the differances recently, but I can't remember where....) have a little more meat in front of the cylinder base gasket area. Not really a big differance unless you are building a serious motor or going big stroker and trenching the case. Other than that they are interchangeable. Some early RZ cases may not have the hole blocked off where they used a mechanical tach. The plug that is used in the Banshee cases will work. Cylinders are obviously PV on the RZ. Exhaust fittment may be an issue as stated earlier. Gearing is different. The biggest differance is that in the higher gears the spread between gears is less for the RZ. Final gearing (chain sprockets) on an RZ is geared towards a higher top speed than a Banshee. As speed goes up the effect of wind resistance becomes a huge factor. There needs to be less of a gap between gears to make up for the increased wind resistance otherwise the bike will not be able to stay in the powerband if the RPM's drop too much when you shift. First gear is also lower to get the bike moving easier with the taller final drive ratio. With the RZ trans ratios (and normal Banshee sprockets) you would wind up running through 1st gear way too quick and then probably wind up looking for a 7th gear on the top end. Here is a comparison of the gearing: Banshee Transmission type: 6 speeds, constant mesh Clutch: manually operated, wet multiplate Transmission primary ratio: 66/23, 2.869 Transmission 1st gear ratio: 32/13, 2.461 Transmission 2nd gear ratio: 29/16, 1.812 Transmission 3rd gear ratio: 27/18, 1.500 Transmission 4th gear ratio: 25/20, 1.250 Transmission 5th gear ratio: 23/22, 1.045 Transmission 6th gear ratio: 21/24, 0.875 Transmission final ratio: 42/13, 3.230 RZ350 Transmission type: 6 speeds, constant mesh Clutch: manually operated, wet multiplate Secondary reduction system: Chain Secondary Reduction Ratio: 40/17 (2.352) Transmission primary ratio: 66/23, 2.869 Transmission 1st gear ratio: 36/14, 2.571 Transmission 2nd gear ratio: 32/18, 1.778 Transmission 3rd gear ratio: 29/22,1.318 Transmission 4th gear ratio: 26/24, 1.083 Transmission 5th gear ratio: 25/26, 0.962 Transmission 6th gear ratio: 24/27, 0.888 1 Quote Link to comment Share on other sites More sharing options...
Vintage Smoke Posted August 23, 2010 Report Share Posted August 23, 2010 BTW....So Cal Banshee you have a PM. Quote Link to comment Share on other sites More sharing options...
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