Cobra 50 ???
- Thread starter JFN
- Start date
The PW3 runs the Morini motor and the CM50 and King run the Cobra motor. Pm or email Jasle (Jason Renville, owner Southwest Superminis) for more info or check out www.cobratalk.com.
We have a KTM Mini Adventure now but if i could afford a new bike I would get my son either the PW3 or CM50.
We have a KTM Mini Adventure now but if i could afford a new bike I would get my son either the PW3 or CM50.
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Jasle
Sponsoring Member
- Nov 27, 2001
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Yeah the Cobra motor is designed and built by Cobra themselves. Like theroyz71 said the pw3 runs the Morini S6C motor. Do you have any specific questions about the motor? Shoot me an e-mail or hit up Cobratalk.com There is a ton of info there about the bikes, minor issues, tuning and the sort.
ONe thing that can answer some questions is to check out the Jan issue of Amatuer MX magazine. There is a great article about Cobra, its roots and a Monster Garage article about Mod bikes and a build off, which I was part of...
www.amatuermx.com
As far as basic company info check out their website. www.cobramotorcycle.com if you find my phone number feel free to call me...its in the dealer section of cobra's site.
ONe thing that can answer some questions is to check out the Jan issue of Amatuer MX magazine. There is a great article about Cobra, its roots and a Monster Garage article about Mod bikes and a build off, which I was part of...
www.amatuermx.com
As far as basic company info check out their website. www.cobramotorcycle.com if you find my phone number feel free to call me...its in the dealer section of cobra's site.
- Thread starter
- #4
Thanks to both theroyz71 and Jasle for their replys. A friend of mine just bought one for his son, I'm not sure what model, and asked if I would help him tune it. His boy was racing a Yam PW50 so this is a big jump. I'll have to find out what model he got.
Jasle
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- Nov 27, 2001
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let me know how it goes. its a big jump from the pw to the cobra's. there are some good tricks with the clutch you do to help him get adjusted. blipping of the throttle is the number one clutch and stator killer so you need to set it up or train the kid right away so he does not blip the throttle.
Cr85RaCeR607
Member
- Aug 13, 2004
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Cobras dont have clutches do they? I dont think they do, the only bike of theirs i could think of that does is probably the DC65
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Cr85RaCeR607
Member
- Aug 13, 2004
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oohh mannnnn...i must of sounded really stupid right there...dumb mistake :)
Cr85RaCeR607
Member
- Aug 13, 2004
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yeahh...whenever i hear clutch i automatically think of the lever, not the actual clutch
- Thread starter
- #10
What is the difference in the motors between the PW3 and the CM or King bikes? The motors look the same, by looking at the pics, as in all built by Morini. Also I'm asking if anyone knows what the con rod center-to-center distance is so I can run a sim on it?
Jasle
Sponsoring Member
- Nov 27, 2001
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not sure what pics your looking at but the motors are completley different. the CM's and Kings have a motor that looks like its cut from billet. its actually high pressure cast then machined though. the s6-c motor in the pw3 is a morini motor.
go to www.cobramotorcycle.com go to the tech support and call that number. ask for Phil he can give you the length. FWIW the length on the cobra motor is the same as the Morini...I do believe they still get the crank from Morini then modify it with the stuffers.
go to www.cobramotorcycle.com go to the tech support and call that number. ask for Phil he can give you the length. FWIW the length on the cobra motor is the same as the Morini...I do believe they still get the crank from Morini then modify it with the stuffers.
- Thread starter
- #12
Jasle;
The pics I was refering to were pics of bikes on the internet of different kids bikes. Since I have not had a Cobra motor apart I don't know, alot of the time, what everyone is talking about. I posted on the Cobratalk board about people posting some pics showing the engine components...pistons, crank, crankcase, ports, head and reedcages, for the different motors. Does the King have the same cyl as the PW3? How about differences in pipes? Do all the bikes have 6 transfer ports? Single exhaust or bridged or sub exh ports? Where could I get a port map? Pics are worth a thousand words!!
The pics I was refering to were pics of bikes on the internet of different kids bikes. Since I have not had a Cobra motor apart I don't know, alot of the time, what everyone is talking about. I posted on the Cobratalk board about people posting some pics showing the engine components...pistons, crank, crankcase, ports, head and reedcages, for the different motors. Does the King have the same cyl as the PW3? How about differences in pipes? Do all the bikes have 6 transfer ports? Single exhaust or bridged or sub exh ports? Where could I get a port map? Pics are worth a thousand words!!
Jasle
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- Nov 27, 2001
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no the pw3 and cobra cylinders are way different. morini motor is iron cylidner. cobra is alum with nikasil. cm is single exhasut port with 5 intake. the king has a bridged exhaust port with the same intake ports. the cm and king have about.097" difference in wrist pin heigth and the king piston has an intake window on it. Pipes are cobra designed built by noleen. reeds are the same and cm is a 19mm carb with 14mm recuder and the king will come with a 19mm or 21 with a 19mm reducer. Maps would be only avail from Cobra as far as I know. The pw3 uses and othewise stock s6c with a cobra designed pipe and 12mm carb. puts out about 9.8hp.
I'm without a dig camera for a while mine broke. i missed your post on cobratalk but I can probably get some pics together later this week or early next week. I've got cylinders, reed cages, cranks loose.
any specific quesions or are you just trying to make it better? We've found most power out of making sure the trans is aligned properly. When the bearings start wearing the trans can start to drag.
I'm without a dig camera for a while mine broke. i missed your post on cobratalk but I can probably get some pics together later this week or early next week. I've got cylinders, reed cages, cranks loose.
any specific quesions or are you just trying to make it better? We've found most power out of making sure the trans is aligned properly. When the bearings start wearing the trans can start to drag.
- Thread starter
- #14
Jasle;
Thank you for the reply and info. If you could I would very much like to see some pics. From what you say about these motors is different from what Morini has about them on their web page. They are saying the S6-C motor has 6 transfer ports with a light weight cyl with chromium plated bore. Using a 19mm carb their making 10.5 hp @ 11500 at the rear wheel. Also they have a dyno graph that is interesting. Looking at their graph I think you would tune this motor like a kart motor with the single gear and over rev it has. Does their dyno graph depict a good representation of the PW3 engines power curve? Not in peak readings but in the curve itself? The reason I ask is that when I dyno my friends bike it's always nice to compare it to a know curve.
Thank you for the reply and info. If you could I would very much like to see some pics. From what you say about these motors is different from what Morini has about them on their web page. They are saying the S6-C motor has 6 transfer ports with a light weight cyl with chromium plated bore. Using a 19mm carb their making 10.5 hp @ 11500 at the rear wheel. Also they have a dyno graph that is interesting. Looking at their graph I think you would tune this motor like a kart motor with the single gear and over rev it has. Does their dyno graph depict a good representation of the PW3 engines power curve? Not in peak readings but in the curve itself? The reason I ask is that when I dyno my friends bike it's always nice to compare it to a know curve.
Jasle
Sponsoring Member
- Nov 27, 2001
- 1,358
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JFN said:
not exactly the same. The difference is the pipe. the stock morini pipe sucks. with the PC pipe/silencer combo LEM claims 14.4 from the same motor. That bike is peaky up top though. The pw3 has more on bottom and the clutch is setup to hit real early. It does have a lot of topend hit but not like the the lem. you can take the 12mm and oil injection off and drop the 14 opr 19 on it though.