Webikes Japan sells a Clipping Point 12v 52mm crank. Part# z50j2552cr
Just pay attention to the type: 3-speed/6v, 4'speed, 12v. Each requires its own alternator type. 12v is considered "long rod".
Webikes Japan sells a Clipping Point 12v 52mm crank. Part# z50j2552cr
The trailbikes 51mm crank is the only one of which I am aware, that fits the 6v/3speed alternator. Here's the brain-twister, the same 52mm piston that fits the stock crank, also fits the stroker cranks...should be the same "short rod" compression height, right? Yet, as I recall, a 47mm piston with "long rod"/12v compression height is needed. That's never made sense to me. However...there is a means of figuring this out for oneself. Start out by dry-fitting the original piston (rings removed for ease of installation); if you end up with negative deck height (piston standing proud of the cylinder at TDC, a 12v/long rod piston is needed.I've seen the listings on the dratv site for "short rod" 52mm cranks but they say they're discontinued. Being a "short rod" type, stroker crank, they must act a little differently than every other, "long rod" stroker crank.
The funny thing is Webikes does not mention that the 52mm crank is 6v or 12v. I am going by the snout taper. It ''looks'' like a 12v to me. Not sure if it is something faatcaat is interested in, but worth mentioning.
Webikes is not very informative to say the least.
So the TB stroker crank is bringing the piston down the cylinder farther but not any higher. I will be running the stock head so do you think I can use the stock piston and can it take that much compression?
Agreed...but...there are positive sides to this, regardless. A short rod/CDI crank has a place in the overall (global) parts catalog, too. That makes the piston selection easier/more straightforward...and allows 12v/CDI conversion without any other internal mods. There's a tradeoff, as with anything else, namely the flywheel cover; that boils down to a choice between a CDI flywheel cover or fabbing a spacer plate. A 51-52mm stroke "sleeper" build with 12v/CDI would be cool setup, in its own way.FYI, I was on the Dratv page yesterday and noticed that they now have a 52mm "short rod" crank listed out there for CDI. This is a new item that they were not previously selling. It is not the dragon racing parts porkchopped version, and I have no clue where it comes from or what the details are, but it is out there. Now...if he decides to bring one back for points cranks, we might be in business.
I'm almost done with the first engine(running it with stock bore first then adding the 88cc cylinder and monster cam after knowing engine is fine) which I'm thinking of swapping into the candy yellow special frame to test ride and was wondering what is the best after market exhaust with stock look out there. I have a Chinese copy on there now. Trail Buddy has a couple of nice looking pipes(Thumper 2) and CHP also has a few stock copies. Also I'm still struggling with the candy special yellow engine(weak and won't rev out). My 71' HKO will run circles around it. Someone else on here with a SL70 had the exact same symptoms.