cheetah cub cylinders

[Bansheeman1121]

Ok was just lookingn at these for the 1st time and got a few questions on them, 1 do they hook up to everything i got now pipes reeds head crank domes and all that. 2 Do they already come ported or if i wanted to have them ported could i send them to ayone that ports normal shee cylinders.3 Whats the maximum overbore on them and do they start as standers 350cc like the stockers. And thats all i can think of anyone no about these bad boys

[1800bigk]

Ok was just lookingn at these for the 1st time and got a few questions on them, 1 do they hook up to everything i got now pipes reeds head crank domes and all that. 2 Do they already come ported or if i wanted to have them ported could i send them to ayone that ports normal shee cylinders.3 Whats the maximum overbore on them and do they start as standers 350cc like the stockers. And thats all i can think of anyone no about these bad boys

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1. yes

2. no, maybe

3. yes 350cc, overbore depends on which one you get

Edited March 15, 2005 by 1800bigk

[locogato11283]

1. yes

2. no, maybe

3. yes 350cc, overbore depends on which one you get

339696[/snapback]

haha i was gonna answer the same way. the cub cylinders are made to use all your stock stuff. they come in 65mm and 68mm bore in either standard stroke, 4mm or 7mm.

[01bansheeke]

what he said. i'm just running a clean up port and my shit flat hauls. I have 68mm bore instead of the 65 on a 4 mil stroke. let us know if you want to know anything else

[Oilsmoke]

Locogato them Cylinders would be little harder to hide than a Spacer plate

 

Sorry was first thing that i thought of.

[dlnoss]

Give Nate at McCoy's Performance & Machine Shop a call. His web site is http://moretorque.com/splash.html

He is a dealer/builder and can answer any questions. Nice guy, easy to talk to.

 

I think most of the shops selling them are also porting them. A stock crank is probably not recommended. They are avaliable in different bores but are Nikasil plated.

[locogato11283]

Locogato them Cylinders would be little harder to hide than a Spacer plate

 

Sorry was first thing that i thought of. 

339833[/snapback]

haha thats why im not running them..

[01bansheeke]

I thought it was because you liked to be slow HAHA

[locogato11283]

I thought it was because you liked to be slow   HAHA

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[2004LEBanshee]

What makes these cylinders so special? and what makes a mono block better?

[SDD]

The overall deisgn of the cylinders is way better than the factory Yamaha decided to cast for us. CPI's cub cylinders have a much better 6 transfer port design as well as triple exhaust ports and much better intake area. The Cubs/Cheetahs have port timings already at a level that is far advanced compared to the stock cylinders port layout. This doesn't mean it's a drag motor from the get go but does mean it will not be a trials motor. Think of them as a good dune port from the factory. Another nice feature about the cubs is the coolant passages/jackets. The coolant passages are larger in areas where they need to be to keep temps in check. Anyway to answer Bansheeman

 

1= everything you currently have be it aftermarket or stock should fit the cub cylinders with the exception of the pistons. Your stock or aftermarket head, pipes, reeds, intake, and carbs should just bolt in place just as if the stock cylinders are there. The only questionable thing is the stock airbox... I'll get back to you guys on that.

 

2=is answered above

 

3=There is no need to bore the cylinders as they are nikasil plated. Light siezures and scuffing normally only affects the piston on these cylinders. Should something like a ring snag or something simular you must send the cylinders out to be repaired. The shop will strip off the nikasil coating and weld up any gouged areas with a welder (aluminum) and then bore to a size a little larger than the final bore size. After boring they recoat the nikasil to a thickness that will bring the cylinders back into the proper bore size. Nikasil should last a long time if you take care of your stuff. The replating process costs a couple hundred more than the typical bore and hone if that much. If you want exact numbers I can find out for you guys but it really shouldn't be an issue unless you run without filters or just flat out beat your motor.

 

Anymore questions?

[01bansheeke]

one thing..i know most of you don't have any HANDS on experience with the cubs. They are a VERY tight fit, and you will have to replace the back two outside studs in your cases. have a drill and tap kit ready. It will break

[2004LEBanshee]

thanks for the info your time was appreciated.

[minishee]

one thing..i know most of you don't have any HANDS on experience with the cubs. They are a VERY tight fit, and you will have to replace the back two outside studs in your cases. have a drill and tap kit ready.  It will break

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it will break? as in what part breaks?

[SDD]

He means someone will break a stud off flush with the case... you can get stud extenders instead of replacing the stud. If you do replace the stud spray it with WD-40 or sim and let it soak in for a night. The next day you can try the jamb nut trick or just clamp a set of vice grips on it to remove the studs.