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mattbmx63 Liked a reply to forum topic Anybody ever used Winderosa Gaskets?
2/10/2021 4:40pm
Classic thread right here.
Shit + Shit = Fools Gold
TerryK, thanks for common sense. I will not work on a customers engine unless I am using OEM gaskets. Never had one fail, you get what you pay for.
This forum topic has 20 replies.
Faceaz Liked a reply to forum topic Anybody ever used Winderosa Gaskets?
2/10/2021 4:40pm
Not saying gaskets swell, saying they squish. Never asked which gaskets are good.
This forum topic has 20 replies.
Faceaz Liked a reply to forum topic Anybody ever used Winderosa Gaskets?
2/10/2021 4:40pm
So, you're trashing something you've never used? Glad I'm talking to someone with experience. Yes, thickness is important. So, I'm sure you threw a mic on it & did that on used gaskets that had been compacted. You're so perfect, I'm sure you've never had a head milled before either. Only replace it with a brand new OEM one right?
This forum topic has 20 replies.
Dennis_Fitzpatrick Started a new thread Piston crown erosion question
2/7/2021 1:38pm My son and I picked up a 1996 WR250ZH and are in the process of doing a partial restoration on it. It ran before tearing it down, but take a look at the exhaust side of this piston crown. It’s eroded and curved. I’ll be having the cylinder bored and will be putting in a new piston kit. Does anyone...
This forum thread has 7 replies.
Dennis_Fitzpatrick Added a reply to Piston crown erosion question
2/7/2021 1:38pm Yeah, we just picked this up from a guy, so no telling of the abuse, and neglect it suffered. In the process of the tear down and inspection, now. I’ve never seen a piston in this condition before. I’m sure it will be all good once we get done with it. Thanks guys!
Kidkawie Liked a reply to forum topic Piston crown erosion question
2/7/2021 1:35pm
Pressure test it before you run it again.
This forum topic has 7 replies.
DynoDan22 Liked a reply to forum topic Piston crown erosion question
2/7/2021 1:35pm
That piston crown was pitted away by detonation (pre-ignition). You got very lucky that you didn't scatter that motor. The causes of detonation are: -low quality fuel -incorrect ignition timing (follow service manual instructions to verify correct ignition timing) -excessive combustion temperature (caused by lean condition) -excessive compression (probably not the culprit as the head is most likely stock. A thinner base gasket can cause this) -incorrect heat range of spark plug. You will have to do some CSI work to determine the root cause of the detonation. Air leaks can cause a lean condition, incorrect ignition timing etc.... One...
This forum topic has 7 replies.
Dennis_Fitzpatrick Added a reply to Piston crown erosion question
2/7/2021 6:46am I’ll pull it off and look under it. I’m thinking you’re right, as heat is the only thing that would cause it to melt like that.
sandman768 Liked a reply to forum topic Piston crown erosion question
2/7/2021 6:44am
Show underside of piston, could have had a mag side main seal leak also... you want to make sure you find the cause of that piston condition before you rebuild everything.
This forum topic has 7 replies.
Dennis_Fitzpatrick Added a reply to Piston crown erosion question
2/6/2021 6:59pm Yeah, I just figured out that it’s a plated cylinder. It does need replacing, so I’m having that done, and am replacing all seals and bearings and putting in a new top end kit. I’ll check out possible causes for a lean condition, as well.
sandman768 Liked a reply to forum topic Piston crown erosion question
2/6/2021 6:56pm
There are others on here that are far more knowledgeable than me, but I would say that is a result of a lean condition and detonation. I would think about splitting cases for crank inspection and at least replace mains & seals. Check your carb settings for an overly lean setup. I would also inspect the head for warpage as it’s possible a leaking head gasket/orings could have contributed to the piston condition. If the cylinder is a plated cylinder, you will want to have it replated vs bored out. There is also something going on with the intake side...
This forum topic has 7 replies.
Dennis_Fitzpatrick Added a reply to Bell Moto 3 Helmets
1/29/2021 1:22pm Very nice! I like the black white combination!
Dennis_Fitzpatrick Added a reply to Bell Moto 3 Helmets
1/27/2021 6:13am Looks great!
Dennis_Fitzpatrick Added a reply to Bell Moto 3 Helmets
11/23/2020 8:15am Nice!
GalagaOnMYArm Liked a reply to forum topic Bell Moto 3 Helmets
11/23/2020 5:54am
I was looking at the new Moto 3, but I had a REALLY bad concussion in the OG one so I decided not to get it. I was thinking maybe the LS2 retro helmet. At least it has MIPS and some modern safety features.
This forum topic has 26 replies.
Dennis_Fitzpatrick Started a new thread Build your own leak-down tester.
10/30/2020 4:05pm I wanted a leak-down tester and they cost over 200 dollars, so I decided to make my own. I used a solid acetyl copolymer rod and drilled it out and drilled and tapped the holes for the brass fittings. I bought the gauge from Amazon for 20 dollars. Came out fairly nice. 
This forum thread has 13 replies.
Dennis_Fitzpatrick Added a reply to Build your own leak-down tester.
10/30/2020 7:16am No need to be condescending...
Dennis_Fitzpatrick Added a reply to Build your own leak-down tester.
10/29/2020 8:41pm So, high pressure air applied to the crank will blow the seals out. If I’m not mistaken, the transfer ports come into play when the piston skirt rises above their openings. Explain your concern.
Dennis_Fitzpatrick Added a reply to Build your own leak-down tester.
10/29/2020 5:37pm Motion Pro’s 2 stroke crank leak down tester. This is why I made one. https://www.motionpro.com/product/08-0071
Dennis_Fitzpatrick Added a reply to Build your own leak-down tester.
10/29/2020 5:34pm Yes, and that is for above the piston compression leakdown.