How many hours is too much for a 250 two stroke

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7/27/2018 8:09 PM

Going to look at a bike tommorow its a 2014 tc 250 and it says the bike has a total of 88 hour on the entire bike , is this alot for a two stroke , will i have to rebuild the top end soon?

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7/27/2018 8:20 PM

Chris Lyman wrote:

Going to look at a bike tommorow its a 2014 tc 250 and it says the bike has a total of 88 hour on the entire bike , is this ...more

You should be good for another 10-15 hrs assuming PO regularly cleaned air filter and did not abuse the bike.

Good news is a two stroke top end is so easy a child could do it. Plus, less actual parts to replace (piston, rings, gaskets - done).

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Ride like a girl!!!
2017 KTM 250 SX
2016 KTM 500 EXC-F
Current project: 2007 Kawasaki KX250-R7 retro build
Current project #2: 1987 Kawasaki KX250-E1 rider/racer resto
1989 KX125 resto
1987 RM250 resto

7/27/2018 8:26 PM

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7/27/2018 8:27 PM

Chris Lyman wrote:

Going to look at a bike tommorow its a 2014 tc 250 and it says the bike has a total of 88 hour on the entire bike , is this ...more

queen of spodes wrote:

You should be good for another 10-15 hrs assuming PO regularly cleaned air filter and did not abuse the bike.

Good news is a ...more

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7/29/2018 9:35 AM

Chris Lyman wrote:

Going to look at a bike tommorow its a 2014 tc 250 and it says the bike has a total of 88 hour on the entire bike , is this ...more

I have a 17 tc 250 and I just did first top end on the bike since new and it had 80 hrs on it and when I pulled apart it looked awesome.. but I keep clean air filters in bike and maintain my bikes also.. 88hrs could be a lot with shitty maintenance but if it’s as clean as he says I wouldnt stress it.. with that said I always throw a new top end in used bikes I buy, cheap insurance and you can check the crank while it’s apart.. also put a hr meter on it if it doesn’t have one already..

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7/29/2018 11:22 AM

you can put literally hundreds of hours on them before they "need" anything.

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7/29/2018 1:44 PM
Edited Date/Time: 7/29/2018 1:53 PM

barnett468 wrote:

you can put literally hundreds of hours on them before they "need" anything.

Not true at all. Hard riding on a 250 two stroke your looking at 40 hours max top end. It all depends on how hard it was rode and maintained.

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7/29/2018 3:32 PM

barnett468 wrote:

you can put literally hundreds of hours on them before they "need" anything.

Maybe a couple on the crank. Def not the top end

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7/30/2018 12:07 AM

88 hours is nothing if it has been maintained properly. If I bought it I would put a new piston kit in anyway just for peace of mind. I usually change a piston at 40-50 hours on my yz250 cos its not hard to do and a lot cheaper than having a piston let go.

Just check all the bearings for free play. Some may need replacing or at least re greasing and brake pads could be due for replacement too

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7/30/2018 5:50 AM

288 hours on my 2017 KTM 250xc, no major issues to report, currently on piston number 5.

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7/30/2018 4:43 PM

navalseabee wrote:

288 hours on my 2017 KTM 250xc, no major issues to report, currently on piston number 5.

Man I wish I could of put 288 on a 2017, thats impressive

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7/30/2018 5:08 PM

I have a 2006 YZ250 that I bought brand new in March of '06. I don't have an hour meter, but here's the status:

-Estimating 250-ish hours complete
-On the 4th piston, due for replacement. (About 50 hours each. Some racing, some practice, some playriding.)
-Original crank/ bottom end bearing. Zero up/down movement in the connecting rod at the bottom bearing.
-On the 2nd clutch pack. Same basket, pressure plate, hub.
-On the 3rd set of fork seals, but the 4th set is due.
-Shock eyelet bearings or linkage bearings need replacement.

These things last if you run good oil and don't abuse them too much.

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Braaapin' aint easy.

7/31/2018 3:54 AM

I go 50 hours on a piston on my Y250, so I’d say you’re good. Like another poster said check the bearings for free play and throw a new piston in for peace of mind.

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7/31/2018 7:50 AM

I also did my first top end at 50 hours. At 96 I did a complete rebuild. Bottom end looked totally fine. Unfortunately I did find a crack starting in the cylinder between the ports.

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8/3/2018 2:38 PM

I just put a piston in my YZ250 @53 hard hours. It had some blow by, but the motor was still strong and getting good starts. Skirt breakage was my real concern.

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8/3/2018 11:23 PM

now i'm really curious how those pistons are when it comes out.. got any pictures?

40 to 60 hours of riding is a lot.. in sand what we got here. Only thing what will be destroyed is the cylinder and piston ring. Rule over here is around 20 hours for mx, enduro riders will last longer with a piston but in the end they are destroying there cylinder.

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8/6/2018 8:53 AM

Not a great pic...

Photo

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8/6/2018 10:41 AM

Evoracer wrote:

Not a great pic...

Photo

Holy blow by batman

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8/12/2018 2:06 PM

r18b wrote:

now i'm really curious how those pistons are when it comes out.. got any pictures?

40 to 60 hours of riding is a lot.. in ...more

Indeed, in the sand here you can't make that many hours, for my it is, 125 12hours, 250 2stroke 25hours en my 450 40hours. Bikes have to work so hard on the sand tracks here. A 125 is almost wide open all the time.

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8/12/2018 3:24 PM

I like how people who don't have hour meters "estimate " how many hrs they have and that is so inaccurate it's funny but hey we all need a good laugh every once in awhile

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8/12/2018 6:38 PM

ktm-5 wrote:

I like how people who don't have hour meters "estimate " how many hrs they have and that is so inaccurate it's funny but hey ...more

Usually it’s either way under, or way over. Sorta easy to gauge by the person.

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If you're not mixing gas, you're not haulin ass.