TRX250R.ORG
Workshop => Engine and Bottom End => Topic started by: 250Racer on March 02, 2014, 11:51:08 PM
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So I tore my cylinder off my last week to do a fresh bore/piston. After goofing around looking up serial numbers and casting numbers I came to relize my cylinder reads 87 HA2 . Meaning 1987 ATC250R!! So I contacted a higher up at 3WW and he said that its pretty rare . As there was a 1987 ATC250R that was supposed to be released but we all know that it didnt happen, but some were supposedly sold in Canada. He also said that the cylinder I have was probably sold through a dealer as a replacement cylinder from a left over cast or some of the engines were sent to tech schools
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Thats pretty cool if thats true. I wonder if it was the same as the trx in 87? Is your motor a long rod?
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Thats pretty cool if thats true. I wonder if it was the same as the trx in 87? Is your motor a long rod?
I got just the cylinder from a guy awhile back. From what ive read yes it was going to be the same engine as the trx with the longrod. Here is a good write up about it: http://www.3wheelerworld.com/content.php/222-MIA-87-Honda-250R-350X
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Neat history. Good article too.
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Thats a pretty cool find, and some cool mystery to it.
I have a question about the sleeve in that cylinder. I have a ha2 cylinder as well, that does not have a year stamp, but it has the same parting lines in the sleeve I see on yours. I was thought that mine might have been cracked. If you or anyone else has any info on that part of that cylinder, I'd be interested to hear it.
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Thats a pretty cool find, and some cool mystery to it.
I have a question about the sleeve in that cylinder. I have a ha2 cylinder as well, that does not have a year stamp, but it has the same parting lines in the sleeve I see on yours. I was thought that mine might have been cracked. If you or anyone else has any info on that part of that cylinder, I'd be interested to hear it.
The cylinder was resleeved I believe?Thats what im thinking?Correct me if im wrong anyone, as im not positive. The year may have been ground off after your cylinder was sleeved to match up. Or ported
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Yeah that could be. Ive never had to resleeve any rebuilds yet, I just assumed the whole sleeve would be replaced.?.?
Thanks, and good luck with your rebuild. Are you gonna run that cylinder again or put it up on a shelf?
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Not sure yet if im going to use it again or not. Might go on the shelf for a conversation piece.
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I know there were quite a few 350X take-out engines floating around for a while. They just cut the exhaust, the wiring, and pulled the engine out. Many went to high schools and trade schools to use for small engine repair training, many ended up in the hands of private individuals (I had one, sold it last year).
Also, just like cars, the next model year is being produced this year to hit showroom floors late in the year.
With these two facts together, although I've never heard of "take-out" ATC250R engines like the ATC350X, I suppose it's not impossible. While a few complete 87 ATCs were sold in Canada, I suppose it's possible the bare engines might have been available in the states.
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Back when I was in high school we had 10 engines in our shop class. 5 were 250R engines and the other 5 were 350x. I'm almost positive the 250R engines were ATC ones.
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Back when I was in high school we had 10 engines in our shop class. 5 were 250R engines and the other 5 were 350x. I'm almost positive the 250R engines were ATC ones.
That's cool we had to work on Briggs & Stratton's
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I knew a guy in the early 90's that worked at Lubrizol, an oil additive company, that ran these engines 24 hrs a day. Its a damn shame I didn't realize what they were untill almost 10 years later!! :dejection: They were put through the wringer though.
But does anybody agree that the above cylinder is a re-sleeve?
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a pic from the top may offer a better indication if its has a sleeve within a sleeve.
john
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a pic from the top may offer a better indication if its has a sleeve within a sleeve.
john
It has a thin sleeve in the original iron sleeve. If you look closely you can see the vertical lines next to the HA and the 87 as well as part of the chamfer on the end of the original sleeve.