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Post by thegenuinenewb on Aug 2, 2022 22:03:07 GMT -5
Hey all. What is the safe max rpm with a stock crank? I’ve installed a malossi 70cc kit, variator and Tecnigas Silent Pro Exhaust. Pretty happy with the setup so far. I’m hitting about 52mph at about 9340rpm and than I back off. I feel like I’ve seen somewhere that 9000 is the safe max rpm for these cranks?? It feels like it has more to go but I don’t want to have some catastrophic engine failure.
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Post by Zino on Aug 2, 2022 22:37:31 GMT -5
Great results for a sport class kit and tecnigas pipe .
With most minarelli builds living below 10 k rpms is considered safe by multiple tuners .
Ohhbuddy posted on modernbuddy and posted on here claims 11k and below is safe for the pgo/genuine crank.
On the modern buddy forums and european pgo forums the guys running malossi kits with hotter pipes were running them for thousands of miles
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Post by thegenuinenewb on Aug 3, 2022 12:45:46 GMT -5
Thanks Zino, I'll see what kind of speed I get WOT while making sure I don't exceed 10k. If it wants to creep past 10k, maybe I'll try heavier rollers. Currently running the 6g rollers that came in the malossi variator kit.
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Post by Zino on Aug 3, 2022 17:22:44 GMT -5
That is a great pipe that has a wide powerband and good top end for a street pipe . With my zuma setup I had a full gram of leeway for variator weights with plenty of takeoff power and top speed
We have not seen that pipe mounted up on a roughhouse Yet Can you take a picture of your pipe mounted up on your scoot from a few different angles . Did you have to shim or bend dremel it to make it fit ?
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Post by nzkieran on Aug 8, 2022 0:05:14 GMT -5
What engine is inside the Roughhouse 50? I can’t decide if I’m going to buy one, or the Euro 4 Typhoon - I’m pulling my hair out haha
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Post by Zino on Aug 8, 2022 1:51:36 GMT -5
The roughhouse is 2 stroke horizontal minnarelli copy married to qmb 139 transmission . So the pipe and Bbk kits that work on Yamaha 2 strokes . The transmission is a Honda Clone .
PGO Big max or PGO PMX naked in Europe are the same scoots as a Roughouse in the States
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Post by aeroxbud on Aug 8, 2022 5:01:31 GMT -5
What engine is inside the Roughhouse 50? I can’t decide if I’m going to buy one, or the Euro 4 Typhoon - I’m pulling my hair out haha I had a Euro 4 typhoon. So many problems, wish I had never brought it. Build quality and the standard of assembly left a lot to be desired. But perhaps I was unlucky.
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Post by thegenuinenewb on Aug 8, 2022 22:53:59 GMT -5
That is a great pipe that has a wide powerband and good top end for a street pipe . With my zuma setup I had a full gram of leeway for variator weights with plenty of takeoff power and top speed We have not seen that pipe mounted up on a roughhouse Yet Can you take a picture of your pipe mounted up on your scoot from a few different angles . Did you have to shim or bend dremel it to make it fit ? Here's a couple of pics. It fit with no modifications. I was barley able to squeeze 1/4 inch thick rubber washers in-between the exhaust mount flange and the scoot.
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Post by Zino on Aug 9, 2022 8:08:47 GMT -5
Looks great I unhooked the pollution control canister and tucked the rest of the tupe under the seat
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