GeekLion wrote:
Good stuff here. Bummer about the crank corrosion, but good opportunity to upgrade. Looks like the SIP 60m stroke crank is very nice. I am looking at these cranks for my Patina200E; which I'll be doing a similar build on. Interesting how they altered the machining for the intake opening web. You should be able to use the stock USA head, as the 60m stroke should give 0.0 squish, then just shim the head to where you want it.
And that's exactly how i'm having to look at buying that new SIP crank. But that corroded crank is sooooo close to being a keeper though! The SIP cranks looks to be a much more efficient design with that "knife" edge that it has. The con-rod is pretty darn nice as well. The last P200 engine i built has a stock squish of 3.8mm! so it should be interesting to see what my initial squish will be. The guy at the machine shop might be finished with the hone/bore (not sure which i'm getting. I'll leave that up to him) on my cylinder this weekend.
I'm really interested to see how much more torque the long stroke will give me. I guess there's no real "apples to apples" testing though. Since the long stroke will give me an actual squish, i should get a bit more power out of it by just having that squish. I'm also really curious what my ending cylinder head compression will be once i set my squish. I guess i'll just have to wait and see!
I live where there's lots of hills and headwinds, so having that short 4th gears REALLY helps out my scooters big time.
My widebody engine mount adapter has been stuck in customs for the past week and a half, so i'm still waiting on that. I did do a little bit more pressure washing of the rust a couple days ago. The scooter got a little bit lighter weight...