chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 18, 2021 12:55:58 GMT -5
Hello guys iam new here i need to say thanks that you can read my thread coz iam a little shit on english...i need a help plz,my mechanic is a good tig welder and he is making 4t exhaust,i want to make one that can holds 125-180+cc,so i tell him to make me one but he needs a good skech with mesurements to make me one,the guy is a very good friend and ive never pay him str8 for his job coz he never take money for me...now we will make it at the start 150cc(he have a skipper 150 for scrap)and later 180cc,does anyone can help me on make an exhaust?Any scech with mesurements?Thanks!
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Post by aeroxbud on Apr 18, 2021 16:28:37 GMT -5
Welcome to the forum. The PM Tuning exhaust used to be the go to for these engines. Like what's pictured on my avatar. Unfortunately they have stopped producing these now. Never fear. Our own super pipe builder, mad scientist 190mech will point you in the right direction. You will need some engine specs though. |
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chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 19, 2021 3:41:10 GMT -5
Ok thanks iam waiting for his reply then!!!
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Post by 190mech on Apr 19, 2021 4:03:07 GMT -5
OK,I'm here!Will need bore and stroke,max RPM,exhaust port duration,exhaust port area,length of exhaust port from piston face to flange,horsepower,diameter of exhaust port flange..Get me as many as possible..
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chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 19, 2021 4:54:06 GMT -5
Ok seems not that easy  but i wil come back when the parts will put together and tell you the info that you need thanks mate!!! |
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chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 19, 2021 6:12:46 GMT -5
Ok and a question here,you need the rpm and hp that i want to target or what it has 9i need to put it on dyno?),it seems to be tottaly noob here  |
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chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 19, 2021 13:41:39 GMT -5
but at the end i dont want to make any racing things just a fine tuning,does anyone have any mesurements from a pm exhaust?
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Post by 190mech on Apr 19, 2021 18:20:00 GMT -5
No dyno needed!If you have a near stock build,just search the web for basic info..I would guess around 9000 max rpm and 13 HP,175 degrees exhaust duration..
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chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 20, 2021 5:14:16 GMT -5
ok so with that info that you have you can draw me an exhaust or you need more?Thanks for the help man!!!
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chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 20, 2021 5:15:42 GMT -5
no porting job for 150cc that i will put in it will be stock piaggio skipper cylinder/head
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Post by 190mech on Apr 20, 2021 19:15:42 GMT -5
What I quoted was a guess,you will need to provide all the info you can find as asked in the post above,,
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chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 21, 2021 15:02:49 GMT -5
ok mate thanks i need time coz my mechanic have many bikes to repair coz of summer comming,thanks alot i will come back,take care!!!
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Post by 190mech on Apr 21, 2021 19:24:26 GMT -5
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chaos
Scoot Junior
2stroke lover
Posts: 16
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Post by chaos on Apr 23, 2021 1:20:30 GMT -5
i can if you need some mesurements i have the cylinder and piston in my house!
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Post by 190mech on Apr 23, 2021 3:56:38 GMT -5
Yes,get the bore size and the distance from the top of the cylinder to the bottom of the transfer ports,also need the diameter of the exhaust port at the flange..Somme pics would be nice also!
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but i wil come back when the parts will put together and tell you the info that you need thanks mate!!!