Tore into a 90 motor we picked up, pulled the top end, found a sleeved cylinder and the Piston had plugs in the wrist pin holes instead of clips. What brand of Piston is this?
Roostin' Away
Arm chair racerRoostin Away
Tore into a 90 motor we picked up, pulled the top end, found a sleeved cylinder and the Piston had plugs in the wrist pin holes instead of clips. What brand of Piston is this?
90 nickolson Bored and Stroked "The Good"
Big Bore 110 Pauter frame "The Bad"
90 Bored and Stroked “vey’s frame” "The Ugly"
110 JSC frame Bored and Stroked
flat track build. “Shop trike”
1974 original 90 X 2
1974 Original 70.
Power User
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Powroll used the nylon plugs
78 atc 90/180cc Dickson Full Suspension
76 ATC90/180cc Nicholson
77 atc 90 Dickson Full Suspension
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Got The Holeshot
Arm chair racerJust too addicted
Teflon plugs were pretty popular for air cooled VW builders back in the day too. Seen them in those engines more than once.
Oiled teflon would last a very long time so it's not a bad idea. Certainly easier to assemble than those GD ring clips.
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Teflon plugs can be used in pretty much any 4 stroke piston, you just need to get the right diameter and length.
They are (were?) popular for drag bike engines that had to be torn down often, but they can leave a residue on the cylinder that some people feel affects ring sealing, so they aren’t as popular for engines that aren’t opened up a lot.
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At The Back Of The Pack
Arm chair racerFirst time rider
Another one for Powroll using them, my old mans Powroll’d XL250 uses them.
2 in the back, 1 in the front.
Roostin' Away
Arm chair racerRoostin Away
I like learning something new..
So this thing had a +6 oversized piston, had been resleeved obviousley. Had a hi/lo delete case, a ported head espessially the exhaust port (oops), had a stock cam and stock crank. Was hoping for a stroker beings whoever did the work had to split the cases for the delete case half. We have not tore the head apart to evaluate for heavy duty springs. The thing had no compression, fluid running out the exhaust port.. At this point we are hoping the piston, rings and cylinder are all within specs, fix the head and leave it be.
Last edited by DAM shop; 07-24-2019 at 05:12 PM.
90 nickolson Bored and Stroked "The Good"
Big Bore 110 Pauter frame "The Bad"
90 Bored and Stroked “vey’s frame” "The Ugly"
110 JSC frame Bored and Stroked
flat track build. “Shop trike”
1974 original 90 X 2
1974 Original 70.
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