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  #1  
Old 10-18-2018, 02:45 PM
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Default 98 Cr250r questions

     

Hi y'all

I recently picked up a 98 cr250r that needed a top end for 400 bucks. So they previous owner rebuilt it and on first ride water pump seal failed and overheated/seized piston. I'm looking at either sending off the oem cylinder to have it replated and ported or I can pick up a 00 cylinder in good shape for around the same price. I know that the 00 cylinder is typically a better cylinder but ported can the 98 cylinder run just as good or better? also are the adjustable compression cylinder heads (phatheads) worth using?

Thanks in Advance
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Old 10-18-2018, 04:12 PM
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It is my understanding that '92-'01 motor parts interchange, but your most trusted source would be Dogger315. As far as the phatheads go, I can't say anything about them because I've never run one and (honestly) wouldn't make the investment on an older bike the could be put out of commission any time due to a cracked case. I had a '00 and eventually sold it because I realized parts were drying up a bit. Additionally, I'd put in a bottom end if I was tearing that far into it since the previous owner does not seem to have been too careful with the bike; that way, you're not stuck taking the motor apart again soon after closing it back up. I'd personally rather put the money into a new crank and main bearings than into an aftermarket head.
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Old 10-18-2018, 08:15 PM
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I would send off the jug to powerseal or millenium for a replate. if you buy the used cylinder the bore clearance of your new piston could be way off. when they weld your cylinder they bore it out to the pistons they have in stock!!! check out my full engine rebuild video on youtube!!!!!
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Old 10-22-2018, 07:31 PM
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There is nothing wrong with the '98 CR250 cylinder. I'm pretty sure Ronnie Mac run a stock 98 and the screamin eagle rips pretty good. I'd get it replated at Millenium or Powerseal and go rip it up on the '98!
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Old 10-22-2018, 08:42 PM
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Power seal tells u to send the new piston to them when they plate it as far as a used cylinder i would get there input .
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Old 10-22-2018, 09:05 PM
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Definitely, yes send them the piston you plan to use so they can set the clearance accordingly.

My point was that the '98 cylinder is just fine compared to a '00 or '01. I have a '98 with an air stryker carb and boyessen rad valve. This bike rips. You won't be hurting for power!
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Old 10-23-2018, 03:08 PM
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The 98 cylinder is pipey and lacks low end. I have a 96 cylinder which is the best year, it rips from the bottom thru middle with plenty of over rev.
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Old 10-31-2018, 05:30 PM
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You'll never hear me badmouth a 96 CR250!. All around great motor, smoother and easier to ride than the 98 for sure but for me, the raw power of the 98 -with the mods I mentioned tops the 96. I rode them back to back and still came away impressed with the 98!
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