2017 RMZ450 Low Hour motor issues?? Edit: Found the problem. Cracked Piston

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1/24/2019 1:13 PM

yz133rider wrote:

No other damage? Slap an upgraded piston in while in there and gain some power? Hopefully thats the case and its an easy fix ...more

mattyhamz2 wrote:

Nope, no other damage. Haha I asked him about that but he wants to keep a standard piston in it. Usually keep all of our bikes ...more

yz133rider wrote:

Im all for stock too generally but a quality piston from wossner or cp isnt a bad idea in my uneducated opinion. I certainly ...more

I asked him about a CP or any other but he was pretty firm on stock haha. Believe it or not, I can't think of a time we haven't used an OEM piston in any of our bikes since I was a kid.

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

1/24/2019 1:52 PM
Edited Date/Time: 1/24/2019 1:54 PM

mattyhamz2 wrote:

Here’s a picture of the piston ?? Photo

In before all the jugheads who say that looks like it has over a hundred hours on it.

Pretty cool that several here properly diagnosed your problem from a single post. Two thumbs up!

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1/24/2019 1:55 PM

mattyhamz2 wrote:

Here’s a picture of the piston ?? Photo

newmann wrote:

In before all the jugheads who say that looks like it has over a hundred hours on it.

Pretty cool that several here properly ...more

Lol. I was surprised by the picture when I got it because I know how many hours are on it. But then again, we live in California and our gas is horrible.

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

1/24/2019 2:27 PM

mattyhamz2 wrote:

Lol. I was surprised by the picture when I got it because I know how many hours are on it. But then again, we live in ...more

Ya know, I always wonder about this and what's the "worst" batch I've ever gotten as far as pump fuel goes. I always mix pump fuel with VP c12 in my 2-strokes for the purpose of engine health (not power).

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1/24/2019 2:35 PM

newmann wrote:

In before all the jugheads who say that looks like it has over a hundred hours on it.

Pretty cool that several here properly ...more

mattyhamz2 wrote:

Lol. I was surprised by the picture when I got it because I know how many hours are on it. But then again, we live in ...more

seth505 wrote:

Ya know, I always wonder about this and what's the "worst" batch I've ever gotten as far as pump fuel goes. I always mix pump ...more

In our 2 strokes we run straight c12 or vp110, but usually c12. We only mix when we absolutely have to. Not the most cost efficient way to do it, but damn if those 250's don't run amazing on straight c12 lol

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

1/24/2019 9:04 PM

Seems like there might be a piston design problem. I know what you mean by OEM pistons are good and used to always go that route but since running Vertex for over 15 years and seeing how they wear and last, I'm all for Vertex or Wossner. I'd be putting a standard replacement (i.e standard compression ratio) from one of those companies without question, especially given the multiple examples of failure shown and listed here.
http://www.na.vertexpistons.com/ProductInfo.aspx?item_id=5977
Photo
Replica Piston Kit
Description:
Replica Piston kit; 12.5:1 Kit includes: Piston, rings, pin, clips
Part Number: 23863B
Distributor Part Number(s):
Western Powersports #: 175-23863B
Tucker Rocky #: 823382
MTA #: 316-643380
OE Part Number(s):
SUZUKI: 12110-28840
For Models:

2013 - 2017 Suzuki RMZ 450 BIKE
Status:
In Stock
Purchase
Price:
$179.95
each

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1/24/2019 9:39 PM

Did the oil smell like gas at all? I would think some got blown into the crank.

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The older I get, the faster I was.