know anything about 2 strokes?
Thread Starter
|
Fleet Mechanic
Joined: Mar 2007
Posts: 1,398
Likes: 1
From: Simi Valley, CA
ok heres what i got, i took the head off and now the piston moves, its still hard but it moves, here are the pictures...
stripes on the far wall of the cylinder
so as you can see i was able to move the cylinder
to me, an untrained eye, it doesnt look out of the ordinary, cept for those big marks on the back side of the cylinder, those dont look good to me. but i will let you guys tell me what you think.
Glad i took it apart, it was super easy, and didnt pay hundreds of dollars to have someone do it, good call steve.
stripes on the far wall of the cylinder
so as you can see i was able to move the cylinder
to me, an untrained eye, it doesnt look out of the ordinary, cept for those big marks on the back side of the cylinder, those dont look good to me. but i will let you guys tell me what you think.
Glad i took it apart, it was super easy, and didnt pay hundreds of dollars to have someone do it, good call steve.
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
E-Bay 269cc bore kit:
eBay Motors: Cylinder Works Big Bore Kit Yamaha YZ250F YZ 250F YZ250 (item 260366418503 end time Apr-23-09 10:37:20 PDT)
Edit: Looks like we posted about the same time. Are those pits there above the exhaust port or is it built up metal, like galling?
eBay Motors: Cylinder Works Big Bore Kit Yamaha YZ250F YZ 250F YZ250 (item 260366418503 end time Apr-23-09 10:37:20 PDT)
Edit: Looks like we posted about the same time. Are those pits there above the exhaust port or is it built up metal, like galling?
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
Hm - well it's kinda hard to tell looking at a pic but the cross-hatch pattern is still there on the cylinder walls, so it doesn't seem to be too worn, you might be able to bore it. No gouges?
I guess now that it turns, you can check for spark
I guess now that it turns, you can check for spark
Thread Starter
|
Fleet Mechanic
Joined: Mar 2007
Posts: 1,398
Likes: 1
From: Simi Valley, CA
nope in fact those stripes on the back wall that look like burn marks rubbed off when i felt the cylinder, so thats not even metal wear, just maybe a leaky piston rings or gasket at the top or something, but the wall is smooth all over
Thread Starter
|
Fleet Mechanic
Joined: Mar 2007
Posts: 1,398
Likes: 1
From: Simi Valley, CA
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
I believe you would have to separate the case halves to do that, unless there is enough room to get to the connecting rod bolts after sliding off the cylinder.
Thread Starter
|
Fleet Mechanic
Joined: Mar 2007
Posts: 1,398
Likes: 1
From: Simi Valley, CA
ha no i had just filled it up and there was plenty of gas/oil mixture in the tank. i guess i forgot to say that i had gone for about a 20 min ride and everything was fine. i came back let the bike sit a while, then when i went out again after letting the bike sit for about 20 min it died after about 10-15 min of riding again...im not sure that makes any difference though
Post Fiend
Joined: Nov 2008
Posts: 23,849
Likes: 20
From: McKenzie River
Easy on outboards, but on those things I cant say.......The bore appears to my eyes to have scoring/scuffing, but I do not know how many hours are on it, I dont know your skill level but it looks like you need to go deeper into the motor and check piston/rod/ brg/crank...........Maybe time to stop and have a shop check it out?
Thread Starter
|
Fleet Mechanic
Joined: Mar 2007
Posts: 1,398
Likes: 1
From: Simi Valley, CA
now before i really get my hands dirty with more tearing down, what could cause this problem in the rod and piston? and how hard is a continued tear down going to be, does it stay pretty easy? cuz if not i will just take it to a shop from here on out
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
Probably not - but a nine minute ride would have......
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
Everything you don't do though, you have to pay someone else to do.