Sophomore Rider
Currently Offline
Posts: 159
Likes: 0
Joined: Apr 8, 2013 11:38:56 GMT -5
|
Post by bwader on Apr 24, 2013 0:14:01 GMT -5
Just wanting to hear people who tried this. I wouldn't I'd just get a 250cc scooter, or as a replacement engine
|
|
|
|
Post by alleyoop on Apr 24, 2013 0:31:01 GMT -5
If you go for the 200cc, ask what size piston is on there and if it has a stroker crank and head with bigger valves. Heard from others that bought it is that it is just a 161cc build on it no where near a 200cc motor. For it to be near a 200cc motor it has to have at least a 63mm piston. I have a 182cc build took a 62mm BBK and a 60mm Stroker crank.
Alleyoop
|
|
Sophomore Rider
Currently Offline
Posts: 159
Likes: 0
Joined: Apr 8, 2013 11:38:56 GMT -5
|
Post by bwader on Apr 24, 2013 2:04:08 GMT -5
I'm just curious what kind of performance would come out of it. Good point, that would be some major rounding up to get "200cc". But if its a real 200cc that is a pretty good deal with an oil cooler. www.scrappydogscooters.com/125_150cc_Performance.htmlThere's another one below it that is 50 bucks more with Forward,Neutral, and reverse shifter |
|
|
|
Post by scooterelements on Apr 24, 2013 9:27:40 GMT -5
My engine i am building i belive it is just about 200cc i think. I forget how to calculate it. I am running a 62mm bbk with a 6mm stroke
|
|
|
|
Post by triker on Apr 24, 2013 10:07:29 GMT -5
How to calculate engine displacement.
My keyboard don't have the mathematical symbols so I will spell them out.
pi x radius squared x height
pi =3.14159 pi is an infinite number so I will just use five digits, you can round it down to 3.1416.
radius = diameter divided by 2
height = length of stroke
My engine is:
pi = 3.14159
radius = 50mm (diameter of piston)/2=25mm
radius squared = 25x25= 625
height = 44mm (stroke)
3.14159 x 625 x 44 = 86.39372
Roy
|
|
|
|
Post by scooterelements on Apr 24, 2013 10:22:38 GMT -5
How to calculate engine displacement. My keyboard don't have the mathematical symbols so I will spell them out. pi x radius squared x height pi =3.14159 pi is an infinite number so I will just use five digits, you can round it down to 3.1416. radius = diameter divided by 2 height = length of stroke My engine is: pi = 3.14159 radius = 50mm (diameter of piston)/2=25mm radius squared = 25x25= 625 height = 44mm (stroke) 3.14159 x 625 x 44 = 86.39372 Roy Math was my worst subject in school lol. Found this online. Might be easier www.scooterhelp.com/tuning/defs.ccs.htmlUsing it my scooter with a 62mm BBK and 6mm crank gives me 192cc |
|
|
|
Post by skuttadawg on Apr 24, 2013 12:02:31 GMT -5
Bore x stroke = displacement
|
|
Sophomore Rider
Currently Offline
Posts: 159
Likes: 0
Joined: Apr 8, 2013 11:38:56 GMT -5
|
Post by bwader on Apr 25, 2013 11:48:02 GMT -5
I was thinking if a stock 150cc top end is about 50-55mph and a stock 250cc top speed is around 65-70+mph then a 200cc I think would run a solid 60-65mph stock. I just wonder what performance it actually gets if you just took a stock 150cc and put in the 200cc. Then with upgrades. I'm sure we all think and wonder these things.  plain smiley face |
|
Freshman Rider
Currently Offline
Posts: 86
Likes: 7
Joined: Mar 17, 2013 21:08:40 GMT -5
|
Post by korn858 on Apr 25, 2013 15:06:51 GMT -5
I'm currently in the middle of this engine swap. It may be done tonight. I will post all that I did to it, and performance increases. From what I understand Scrappy's 200cc is actually a 180cc.
|
|
Sophomore Rider
Currently Offline
Posts: 159
Likes: 0
Joined: Apr 8, 2013 11:38:56 GMT -5
|
Post by bwader on Apr 25, 2013 21:07:16 GMT -5
Im eager to hear your results!  At least if its 180cc its still worth it for someone who d rather skip the big bore kit install work. Then again for someone to do it themselves its cheaper than buying the "200cc" kit |
|
Sophomore Rider
Currently Offline
Posts: 159
Likes: 0
Joined: Apr 8, 2013 11:38:56 GMT -5
|
Post by bwader on May 27, 2013 15:23:55 GMT -5
I want to get this kit! It looks well worth the price
A stock engine costs $385 Partsforscooters then with oil cooler running about 150+ would equal $535!
The kit is $540 it is a real 170cc with an oil cooler, I think that's a of a deal.
Just I have other priorities like paying the bills and keeping my car maintained.
|
|
Freshman Rider
Currently Offline
Posts: 86
Likes: 7
Joined: Mar 17, 2013 21:08:40 GMT -5
|
Post by korn858 on Sept 25, 2013 15:15:14 GMT -5
Well it's finally done! Just got back from the first test drive, and so far I'm impressed.
All speeds are in china meter, so you'll have to calculate. I do know GPS when china meter says 70, I'm going 59.
Ended up with a #115 Main jet, and moving the needle one notch.
Original engine, at 70mph (cm) RPM was at 8,000
Scrappy's engine at 70mph (cm) RPM is at 6,000
Original engine could hit 65 on a long flat with little to no head wind.
Scrappy's hits 70 on a flat no problem. I haven't been over 6,000 RPM yet. Still breaking in.
|
|
Sophomore Rider
Currently Offline
Posts: 163
Likes: 15
Joined: Aug 20, 2013 13:54:34 GMT -5
|
Post by phssthpok on Sept 25, 2013 15:29:23 GMT -5
I do know GPS when china meter says 70, I'm going 59. Your 'multiplier' for conversion is approximately .  (70 x . = 59.5).  |
|
New Rider
Currently Offline
Posts: 37
Likes: 0
Joined: Apr 18, 2013 3:58:22 GMT -5
|
Post by robrun on Sept 25, 2013 21:04:12 GMT -5
math dude RULES!  |
|
|
|
Post by skuttadawg on Sept 25, 2013 21:36:28 GMT -5
|
|
..BAD TO THE BONE..
(70 x .