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Workshop => Engine and Bottom End => Topic started by: trx250scar on January 17, 2015, 01:11:18 PM

Title: OEM cylinder aftermarket head?????????
Post by: trx250scar on January 17, 2015, 01:11:18 PM

Does anyone know if esr makes a head for an oem cylinder. Seems I had saw them before. Now when I look all I c is for pro x type cylinders. I am putting an OEM motor in my r and looking for something with better cooling,  o ring instead of head gasket, and a dome so I can get more compression and  run race fuel.

Title: OEM cylinder aftermarket head?????????
Post by: sanddad21 on January 17, 2015, 01:23:16 PM

Led may be able to help you out. Give them a call

Title: OEM cylinder aftermarket head?????????
Post by: F-Red on January 17, 2015, 02:03:09 PM

Does the cool head offer different domes?

Title: OEM cylinder aftermarket head?????????
Post by: broken1 on January 17, 2015, 02:17:04 PM

Quote from: F-Red;48850

Does the cool head offer different domes?

Yep, I've seen dome sizes from 18-22cc.

Title: OEM cylinder aftermarket head?????????
Post by: trx250scar on January 17, 2015, 02:19:18 PM

Coolhead with an oring is not an easy find. Most reguire gasket. I do not know for sure but I bet cool heads with o rings have been machined that way. Not sent from factory with o ring.

Title: OEM cylinder aftermarket head?????????
Post by: F-Red on January 17, 2015, 02:21:58 PM

If you disire this application, you could have both machined for o-rings.

Title: OEM cylinder aftermarket head?????????
Post by: Jerry Hall on January 17, 2015, 11:18:59 PM

Machining a head for 0-rings is a no-brainer.  Setting up the head for a particular engine takes some time.  Unfortunately there is a lot more involved in setting up a head for race gas than selecting a head with a particular volume!!!!!!!!!!!

Title: OEM cylinder aftermarket head?????????
Post by: broken1 on January 18, 2015, 12:43:45 AM

Quote from: trx250scar;48853

Coolhead with an oring is not an easy find. Most reguire gasket. I do not know for sure but I bet cool heads with o rings have been machined that way. Not sent from factory with o ring.

I heard that o-ring pro design cool heads were kind of rare but I have one that I got new back in the 90's that is factory o-ringed. I sold one I got in a parts lot that was also factory o-ring & had pat pend stamped on it. Should of kept that one for nostalgia.

Title: OEM cylinder aftermarket head?????????
Post by: Rupp250 on January 18, 2015, 10:05:08 AM

Why not talk to a reputable builder and just have your stock head cut and o-ringed for what you want?

I run one like that.

Title: OEM cylinder aftermarket head?????????
Post by: trx250scar on January 18, 2015, 03:26:41 PM

Not a bad idea.I honestly had never seen an OEM head that way.

Title: OEM cylinder aftermarket head?????????
Post by: jadleybray on January 20, 2015, 06:53:50 PM

for all intensive purposes, any "gasket" type head can be cut to accept orings instead
This is an OEM cylinder with a coolhead, oringed by JDI Racing

Title: OEM cylinder aftermarket head?????????
Post by: trx250scar on January 20, 2015, 07:18:51 PM

Nice. I am going to look into it with a builder