+-

Author Topic: Piston is hitting head on new rebuild help please  (Read 8555 times)

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
So I should have a few bores left

Offline Dezsled

  • Trade Count: (0)
  • Forum Moderator
  • Elite Member
  • *********
  • Posts: 2058
Yeah all the way up to 89.5  (Y)
87 HPR LT500
04 Roll LOBO II TRX250R
06 LTR450
87 LT500
85 & 86 LT250
86 & 87 TRX250R
07 & 09 Husqvarna TE450
00 CR125R

Offline Stpltn250r

  • Trade Count: (0)
  • Trail Blazer
  • ******
  • Posts: 644
its a 250. the piston is a 68.50mm

Offline Quadster

  • Trade Count: (0)
  • Weekend Warrior
  • ****
  • Posts: 236
Hes got one bore left. Call Cometic and order an oversize (big bore) gasket for a 87-92 LT 250.

Offline Dezsled

  • Trade Count: (0)
  • Forum Moderator
  • Elite Member
  • *********
  • Posts: 2058
Oh man .... Where are my glasses!

Geeze  :)) :)) :))
87 HPR LT500
04 Roll LOBO II TRX250R
06 LTR450
87 LT500
85 & 86 LT250
86 & 87 TRX250R
07 & 09 Husqvarna TE450
00 CR125R

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
What will the big bore kit do for me

Offline Kyle T

  • Trade Count: (0)
  • Range Rover
  • *****
  • Posts: 483
Some say more power. But not much.
Good porting and pipe combo is better than a normal big bore kit.
That, and give you head gasket problems.

Offline LT250RWV

  • 1991 Lt250r
  • Trade Count: (0)
  • Elite Member
  • **********
  • Posts: 1350
  • Gender: Male
  • Location: West Virginia
Get you a set vforce 2 or 3 s and Scp pipe and some porting you have a strong lt250r. Hey  what brand of headgasket are you using i dont think this question was asked.
91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
K&s gaskits

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
.

Offline Glamisrider

  • Trade Count: (0)
  • Forum Moderator
  • Pro Member
  • *********
  • Posts: 860
  • Gender: Male
  • Location: SoCal
Get the cometics and save yourself a lot of trouble.

www.cometic.com

Or Mitch might have some in the store section, not sure if he carried 250 gaskets though.


Offline Kyle T

  • Trade Count: (0)
  • Range Rover
  • *****
  • Posts: 483
I use OEM. _^_

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
So u think I need bigger head gaskit
I still have to so a few test that were posted a few post ago

Offline Rider414

  • Trade Count: (0)
  • Pro Member
  • ********
  • Posts: 984
  • Gender: Male
  • Location: Detroit, mi
So u think I need bigger head gaskit
I still have to so a few test that were posted a few post ago

Have you ever tried to read your own post?

 D?
Ain't ever seen it......but I have heard it.

Offline LT250RWV

  • 1991 Lt250r
  • Trade Count: (0)
  • Elite Member
  • **********
  • Posts: 1350
  • Gender: Male
  • Location: West Virginia
I use oem gaskets. They are already made for the last bore so you can use them on 67mm or 69mm with no problems.
91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
Had a friend come by and check this motor out for me me is a 2 stroke guy he took some measure ments  he said that with the cly has to come up about .80 to make it stop hitting the head that's about 4 base gaskits is that ok don't sound ok to me

Offline Stpltn250r

  • Trade Count: (0)
  • Trail Blazer
  • ******
  • Posts: 644
i wouldnt do it. Just get a thicker head gasket or custom dome made. stacking gaskets will off set port timing.

Offline Kyle T

  • Trade Count: (0)
  • Range Rover
  • *****
  • Posts: 483
What if the cylinder has been decked that much? That many base gaskets would put the timing back where it's supposed to be. Anyone got port timing for the 250?

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
I asked  him he said my port timing should be dead on I called cometic they said they could make me a spacer in stead stacking gaskits

Offline MotorGeek - Jerry Hall

  • Trade Count: (0)
  • Pro Member
  • ********
  • Posts: 858
Had a friend come by and check this motor out for me me is a 2 stroke guy he took some measure ments  he said that with the cly has to come up about .80 to make it stop hitting the head that's about 4 base gaskits is that ok don't sound ok to me




.80 mm is about 1 1/2 base gaskets.  .080 inches is about 4 base gaskets. 

What did your engine builder do to your engine when he worked on it.  Why would he machine the head gasket surface or base gasket surface that much?

Did he put a stroker crank in it?



I asked  him he said my port timing should be dead on I called cometic they said they could make me a spacer in stead stacking gaskits


I think I smell a rat.



Talk to your builder and find out what he did to your engine and WHY     !!!!!!!!!




I

Offline JayTater

  • Trade Count: (0)
  • Range Rover
  • *****
  • Posts: 409
  • Location: Witness protection capital of America
Sounds like Darahji's builder made it over to the States.. Bubble gum and super glue, makes for the bestest epoxy ever!
Disclaimer: This post is for entertainment purposes only. The author scrupulously shirks responsiblity for any injury, intoxication, or deportations that may result from attempting the actions described within. Do not drink tequila. Tequila is bad for you.

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
He did not stroke it i bought this quad the motor was in a box I had it bored and new crank that was it so I don't no y it's so far off

Offline Stpltn250r

  • Trade Count: (0)
  • Trail Blazer
  • ******
  • Posts: 644
thats unfortunate. probably why the motor was in a box when you got it.

Offline Rytie77

  • Trade Count: (0)
  • Newbie
  • **
  • Posts: 24
Iam sure lol but I now have a lot of time in this quad so iam sure it will all work out

Offline WestTexasKing

  • The Most
  • Trade Count: (0)
  • Elite Member
  • **********
  • Posts: 1119
  • Kills: 9007
  • Location: Monahans TX
1. Get a die grinder.
2. Push piston to TDC.
3. Grind until nothing hits.
4. ??????
5. PROFIT.

 

+- Suzuki Quadracer HQ Store Zone

http://www.suzukiquadracerhq.com/index.php?action=store