Rmz 250 rebuild??

mxer192
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mxer192
Hello so I have a 2016 rmz250 with 94 hours on it we'll maintained. I did the top end at 70 hours. I can't find anything but oem bottom ends for that year bike. Do you think the bottom end would hold up 1 more season?
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mattyhamz2
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mattyhamz2 11/27/2021 7:06pm
11/27/2021 7:06pm
You only want to use OEM bottom ends anyways. The rest are nowhere near the quality of OEM.

As far as another season, it may or may not last. Think of the consequences of trying to push it another season and having a catastrophic failure taking out the cases and head. I say it’s worth the peace of mind just doing it all right now.
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vtec_
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vtec_ 11/27/2021 7:09pm
11/27/2021 7:09pm
how much do you ride? are you fast?

mxer192
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mxer192 11/28/2021 6:20am
11/28/2021 6:20am
vtec_ wrote:
how much do you ride? are you fast?

I'm a vet novice rider. I'm not hard on the bike. I race every weekend from March until September
queen of spodes 11/28/2021 6:27am
11/28/2021 6:27am
mattyhamz2 wrote:
You only want to use OEM bottom ends anyways. The rest are nowhere near the quality of OEM. As far as another season, it may or...
You only want to use OEM bottom ends anyways. The rest are nowhere near the quality of OEM.

As far as another season, it may or may not last. Think of the consequences of trying to push it another season and having a catastrophic failure taking out the cases and head. I say it’s worth the peace of mind just doing it all right now.
This goes for any bike not just RMZ 250s. Aftermarket cranks are notorious for failing unexpectedly with a short service life. Most people who install them do so on bikes they flip, because the price is cheaper than OEM.
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walent215
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walent215 11/28/2021 6:38am
11/28/2021 6:38am
The service manual calls out the big end side clearance and small end ID clearance service limits . If those measure within spec and there isn’t any up/down play I’d run it . If you were a fast A rider banging off the limiter I would replace it . If you don’t have the manual I highly recommend getting one .
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vtec_
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vtec_ 11/28/2021 6:58am
11/28/2021 6:58am
vtec_ wrote:
how much do you ride? are you fast?

mxer192 wrote:
I'm a vet novice rider. I'm not hard on the bike. I race every weekend from March until September
i think you'll be okay for another season

if you were a fast A/B rider id say yeah, do it but if you're a vet novice i cant imagine you bounce off the rev limiter 24/7 doing scrubs off everything
UGOTBIT
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UGOTBIT 11/28/2021 7:00am
11/28/2021 7:00am
Could always have the crank rebuilt, cheaper than replacing. Check out Ken OConnor racing for a crank rebuild
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mxer192
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mxer192 11/28/2021 7:04am
11/28/2021 7:04am
vtec_ wrote:
how much do you ride? are you fast?

mxer192 wrote:
I'm a vet novice rider. I'm not hard on the bike. I race every weekend from March until September
vtec_ wrote:
i think you'll be okay for another season if you were a fast A/B rider id say yeah, do it but if you're a vet novice...
i think you'll be okay for another season

if you were a fast A/B rider id say yeah, do it but if you're a vet novice i cant imagine you bounce off the rev limiter 24/7 doing scrubs off everything
Scrubs!? What's a scrub lol. Jkjk. Yeah I try and stay in 3rd most of the time, keeping the motor mid range. Never hit the rev limiter
harescrambled
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harescrambled 11/28/2021 8:23am
11/28/2021 8:23am
UGOTBIT wrote:
Could always have the crank rebuilt, cheaper than replacing. Check out Ken OConnor racing for a crank rebuild
These days, by the time you get done buying a quality rod kit, and paying the labor to get it rebuilt, you might as well just buy a OEM crank assembly
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Moto520
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Moto520 11/28/2021 8:32am
11/28/2021 8:32am
I think you would be fine. Just an opinion though……I’m basing it off your skill level.
Johnnydirt
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Johnnydirt 11/28/2021 9:14am
11/28/2021 9:14am
UGOTBIT wrote:
Could always have the crank rebuilt, cheaper than replacing. Check out Ken OConnor racing for a crank rebuild
Ken just rebuilt an OEM crank for me, quick turnaround and quality work.
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UGOTBIT
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UGOTBIT 11/28/2021 9:19am
11/28/2021 9:19am
UGOTBIT wrote:
Could always have the crank rebuilt, cheaper than replacing. Check out Ken OConnor racing for a crank rebuild
harescrambled wrote:
These days, by the time you get done buying a quality rod kit, and paying the labor to get it rebuilt, you might as well just...
These days, by the time you get done buying a quality rod kit, and paying the labor to get it rebuilt, you might as well just buy a OEM crank assembly
I know it's hit or miss, just for kicks I priced it out at RM

OEM crank is $370

A ProX rod is $106 and KOR is $95 in labor

Bearings are another $70 each, (OEM crank doesn't come with them) could probably get them cheaper from a bearing supply house.
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mxer192
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mxer192 11/28/2021 9:43am
11/28/2021 9:43am
UGOTBIT wrote:
Could always have the crank rebuilt, cheaper than replacing. Check out Ken OConnor racing for a crank rebuild
Johnnydirt wrote:
Ken just rebuilt an OEM crank for me, quick turnaround and quality work.
What did he charge?
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walent215
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walent215 11/28/2021 10:01am
11/28/2021 10:01am
UGOTBIT wrote:
Could always have the crank rebuilt, cheaper than replacing. Check out Ken OConnor racing for a crank rebuild
Johnnydirt wrote:
Ken just rebuilt an OEM crank for me, quick turnaround and quality work.
mxer192 wrote:
What did he charge?
Interested to know as well ? Pricing plus shipping , tax etc?
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