WANTED Cr250r crankcase

[big_billings]

Does anyone here have a 250r case in good shape? Starting to get parts together for a bike saw project.

 

[Bigmac]

What year?

 

[big_billings]

Preferably a 2001-2007 but I can make older ones work.

 

[Bigmac]

You want the case-reed motor?

 

[big_billings]

Preferably. There is a slight difference in low end power and the jug is Nikasil coated. If I’m to get a cylinder port styled lower end then I will put an esr top end on it.

 

[Bigmac]

There is no esr top end for the 02-07

 

[Bigmac]

For cost I would go with the old cases and run the trx jug, way cheaper, the 92-01 cases go for more, you can now get an esr cylinder for those. The 02-07 can run, but I wouldn’t run on for a hot saw, the power valve is a servo motor and the electrical is a mess compared to the older ones, I have some decent Cr experience, along with trx stuff, pm me if you want to chat about it, not trying to sell anything! Lol

 

[Skeans1]

From memory if you want to run CR cases with the trx cylinders you want 83/84 range?


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[Bigmac]

From memory if you want to run CR cases with the trx cylinders you want 83/84 range?


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I verified with Willard on his build the 83 cases are way off!!

 

[big_billings]

I verified with Willard on his build the 83 cases are way off!!

So what year is the best to put a trx head on ?

 

[Skeans1]

I verified with Willard on his build the 83 cases are way off!!

Did his have a mechanical power valve in it?


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[Bigmac]

Did his have a mechanical power valve in it?


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No, pre power valve

 

[Bigmac]

So what year is the best to put a trx head on ?

I think the 85-86 are be best cases for the trx cylinder. 92-01 cases are great, and the esr 330 cylinder is available now, the 97-01 ignition is perfect and simple and obviously a bolt on. It’s a great way to go. Stock an 01 makes 48hp to the wheel, flywheel hp is more, a 330 esr cylinder is capable of 60hp+

 

[Bigmac]

If your wanting to start out 250, the 92-01 is a great platform you can mix and match the best stuff and all the cylinders are plated , and. 330 is available from esr.
I have a rare 01 Cr250/330 pro-x cylinder non powervalve

 

[Frank bierce]

I wanted to put a saber tooth kit on a trx case

 

[Skeans1]

I wanted to put a saber tooth kit on a trx case

A buddy out of Albany had one he didn’t care for it he preferred his rotax conversion and the puma/super pumas.


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[Bigmac]

I wanted to put a saber tooth kit on a trx case

my buddy is saying he is going to pull the trigger on pantera motor...linger 550, should be cool

it is counterbalanced and basically has a banshee tranny, so it can handle the power

 

[Bigmac]

I wanted to put a saber tooth kit on a trx case

I haven’t run one of those, I have build all of mine as dunners, thous cylinder would be interesting, they take a lot of work to run hard, but might make great dunners. I would love to try a bunch of builds, I want to try so much! There are a lot of options

 

[Frank bierce]

I haven’t run one of those, I have build all of mine as dunners, thous cylinder would be interesting, they take a lot of work to run hard, but might make great dunners. I would love to try a bunch of builds, I want to try so much! There are a lot of options

There are lots of options!! Lol
I do miss my banshee days. Was one of the first In the Coos Bay Area with a set of the cheetah cub cylinders. Bought them for a 4 mil, and had Dan Hull at A&S racing port the cylinders. 6” swing arm was definitely not long enough. Had it dynotuned at 96 hp back then. Probably about 15 years ago.

 

[big_billings]

If your wanting to start out 250, the 92-01 is a great platform you can mix and match the best stuff and all the cylinders are plated , and. 330 is available from esr.
I have a rare 01 Cr250/330 pro-x cylinder non powervalveView attachment 210575

Would you be willing to sell that motor or know a place I should keep my eyes on for a bottom end?