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Post by dexameth on Sept 6, 2018 11:25:02 GMT -5
ratdog good question. The SSP-G stroker crank does not need a longer timing chain. I was able to use NO spacers or extra gaskets using a piston with a shorter compression height. Still got me 205psi compression. If you look at a lot of the GY6 based strokers, some come as kits with the crank, timing chain, longer cylinder studs AND a spacer.
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ratdog
Scoot Enthusiast
Posts: 342
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Post by ratdog on Sept 6, 2018 11:39:48 GMT -5
Ok, a different piston would be my first choice, where did you get the different piston, or was it part of one of the kits you discribe? I hate the pistons that come in most of the big bore kits as they have a rough cast top. That has to act as a heat sink. On a couple of builds, we have turned the tops on these pistons and decked the cylinders to clean them up ( and lower the deck height to adjust for the slightly shooter piston
I have not seen a kit with a different piston yet, so far I only have seen the cranks as a stand alone item
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Post by dexameth on Sept 6, 2018 14:38:45 GMT -5
I got everything from where I work, Partsforscooters.com Our in house brand Hoca has switched names to SSP-G as Matt spoke of before and I wanted to keep everything house brand. Our SSP-G 52mm kit comes with one of those standard pistons but a VERY high quality cast cylinder. I went ahead and got our SSP-G 52mm piston because it's machined down more for less weight, and is slightly domed to match with the Hoca 52mm head. I used all this as well as the SSP-G stroker and it went together like a glove. Here's the products: Cylinder KitPiston Kit52mm HeadI didn't even try to build it with the stockish piston, but I did fear that it would make contact with the valves. I sold the same setup to someone in Pittsburg WITHOUT the nicer piston and he had no issues with the build. I'd like to know what his compression is... |
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ratdog
Scoot Enthusiast
Posts: 342
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Post by ratdog on Sept 6, 2018 16:27:10 GMT -5
Fantastic. So your taking about .050 off the top of the piston then? Have you ever cut one of these in two to see how thick that piston top is? I only ash, because I take about .010” off the cylinder to clean them up. Really, that would be no issue because we already shim them to bring the compression back up. I like that they are 52 mm because tow of the cylinders I have came in BBK already bored for 50 mm, but someone over in China dosent do a very good bore job. Both cylinders have a taper. By going to the 52 mm piston, I can bore the cylinder right ( to fit the piston) and do the real fine hone job I prefere. Thanks!
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Post by scootnewb on Sept 12, 2018 11:50:08 GMT -5
I got everything from where I work, Partsforscooters.com Hook me up fam so I can review the parts on my You Tube channel I haven't created yet. |
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Post by Kick start on Jun 28, 2020 13:22:00 GMT -5
I'm not even going to lie about this build. Stroker 50mm piston big valve head, a9 cam, exhaust, ncy variator 8g sliders, clutch springs 3 red 1 yellow. It won't even do 45mph, the 64mm big valve head does not do much.
I'm rebuilding a stock crank setup and proving its better with the 69mm valves.
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