True 250cc upgrade?

[FlatlandsTbr7]

Does anyone know of a true 250cc cylinder head and jug that can be found?

[Wild Dog]

229 is the max that the CG can go. Remember that the CG was born as a 125cc.
What people do to get more juice out of the 229cc, they put a crf230 piston, they workout the carter to make it a bit bigger, custom cams, custom connecting rods, port and decked head, better mufflers, better carb.
When fully customized they can reach quite decent speed (for this type of engine), also they can reach about 62 mph in about 8, 9 seconds, which may not be too fast if you are used to bigger CC motorcycle, but again it's just a 229cc

[Ariel Red Hunter]

Originally Posted by Wild Dog

229 is the max that the CG can go. Remember that the CG was born as a 125cc.
What people do to get more juice out of the 229cc, they put a crf230 piston, they workout the carter to make it a bit bigger, custom cams, custom connecting rods, port and decked head, better mufflers, better carb.
When fully customized they can reach quite decent speed (for this type of engine), also they can reach about 62 mph in about 8, 9 seconds, which may not be too fast if you are used to bigger CC motorcycle, but again it's just a 229cc

Yeah, but I confuse easily. I don't understand what "they workout the carter to make it a bit bigger" means...ARH

[FlatlandsTbr7]

Thank you for the input wild dog, I might check out the 230 piston, my head is decked and exhaust has been evenly ported. I can run 65-70 on a good warm day comuting to and from work! Thought I'd just reach out there and see what I got back.

[Weldangrind]

There are bigger versions, but they're liquid cooled. They're commonly used in utility trikes in Asia and Mexico, with a tilting box over the rear axle. Jury is still out on the actual displacement, but it's likely between 250 and 270.

[2LZ]

Do we have a source for these custom cams?

[Wild Dog]

Originally Posted by Weldangrind

There are bigger versions, but they're liquid cooled. They're commonly used in utility trikes in Asia and Mexico, with a tilting box over the rear axle. Jury is still out on the actual displacement, but it's likely between 250 and 270.

Those are not related to the CG family, they are mostly suzuki or Kawasaki clones.

Originally Posted by 2LZ

Do we have a source for these custom cams?

If you don't mind making an order in South American, then yes you do.

You have factory made either made in brazil o argentina.



for OHC variants


or custom made to the client taste.





Connecting rods in differnt size for the CGs

[ben2go]

Originally Posted by FlatlandsTbr7

Does anyone know of a true 250cc cylinder head and jug that can be found?

All I gots is dis here water jug. I think you meant cylinder with piston.

[2LZ]

Well isn't that cool!!!?? I'd love to cam the TT. Then it would really be worth the porting.

[Wild Dog]

Originally Posted by 2LZ

Well isn't that cool!!!?? I'd love to cam the TT. Then it would really be worth the porting.

For the CG family in this area of the world there are a shiatload of parts. That's why i was able to source a pz30b plus the rebuild kit for 6 usd.
Those cams goes around 39 usd to 90 usd.

[Megadan]

Originally Posted by Wild Dog

For the CG family in this area of the world there are a shiatload of parts. That's why i was able to source a pz30b plus the rebuild kit for 6 usd.
Those cams goes around 39 usd to 90 usd.

I am actually in the process of trying to order one of those Ressalto cams for my Hawk. They have two versions with increased duration and no extra lift that supposedly will work with no fly cutting to the piston or recessing the valve seats that open up the upper part of the RPM range. I am at the point now where I know the cam profile is my limiting factor.

My difficulty is in trying to even order the stupid thing. Even with a translating program, the websites aren't setup to take international orders and sending e-mails is proving difficult. I almost wish they had a third party broker website like taobao to place an order through.

[Wild Dog]

Originally Posted by Megadan

My difficulty is in trying to even order the stupid thing. Even with a translating program, the websites aren't setup to take international orders and sending e-mails is proving difficult. I almost wish they had a third party broker website like taobao to place an order through.

The issue is to find someone, that speaks english and works in the sales dept.
Other than that they will mostly glad to sell your parts for the engine
Try to contact the Mr Carvalho, WGK makes good products and they are quite popular.
Plus those parts are quite cheap in USD.

[NzBrakelathes]

My info says 125-200 CG cam and follower or at least followers are different to the 250.

Roller rockers for 125-200 are easy enough to get in China but NOTHING roller rockers for a 250.

I could be wrong etc but everything I see point to it being different

[Ariel Red Hunter]

Originally Posted by Megadan

I am actually in the process of trying to order one of those Ressalto cams for my Hawk. They have two versions with increased duration and no extra lift that supposedly will work with no fly cutting to the piston or recessing the valve seats that open up the upper part of the RPM range. I am at the point now where I know the cam profile is my limiting factor.

My difficulty is in trying to even order the stupid thing. Even with a translating program, the websites aren't setup to take international orders and sending e-mails is proving difficult. I almost wish they had a third party broker website like taobao to place an order through.

I think your problem is because you are trying to find someone "who speaks English in the sales department". The Portugues don't do business that way, they use a 'facilitator', a person that doesn't exist in the American business way. He is the guy who makes things happen in any of those places in the world that the Portuguese have ever run. ...ARH

[Wild Dog]

Originally Posted by Ariel Red Hunter

I think your problem is because you are trying to find someone "who speaks English in the sales department". The Portugues don't do business that way, they use a 'facilitator', a person that doesn't exist in the American business way. He is the guy who makes things happen in any of those places in the world that the Portuguese have ever run. ...ARH

It seems that Tashka found an e-mail from someone that works in WGK, speak english and can sell stuff. So megadan can try and see what they reply to him.

People from Brazil are quite prideful of their language and the average people doesn't care to learn any other language. In the rest of south america, we speak spanish, they don't even care about that... So in the end if you want to deal with them. Is much easier to learn to falar portugues.
Then you have small companies, that make parts for small motorcycle, a market that's not really big in the US, so most of the stuff is for the internal market.

What will happen if i send an e-mail to a mom and pop store in the US, asking them question in spanish? Most likely they won't know to write or speak spanish, so they won't be able to reply me.

Originally Posted by Ariel Red Hunter

Yeah, but I confuse easily. I don't understand what "they workout the carter to make it a bit bigger" means...ARH

Watch this, it's spanish but you can see what he does with the carter and what i mean