Guys,
I only got 60 psi upon compression check. What is the minimum and the proper engine compression on this model?
Thanks,
Leo
Guys,
I only got 60 psi upon compression check. What is the minimum and the proper engine compression on this model?
Thanks,
Leo
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
Standard Compression = 142-165 psi
Service limit = 128 psi
Thanks for that. Confirms my motor is shot. Gonna pull the head/jug and see what I got.
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
Ok, removed head and jug. Piston is cracked (looks like the Liberty Bell), almost all of the rings we're seized. Surprisingly the lower end seems fine. No play on the rod/crank bearing. Was sweating it if I had to rebuild that part.
Next question:
1) What is standard on the bore and piston?
Current measurements are:
Piston 70 mm
Bore 70.40 mm
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
Stock bore is 70mm.
That's awesome that you have a stock bore jug...many rebuilds available in the future.
Don't buy a piston until the machine shop measures the bore for you.
Thanks for that. Maybe bore to 71 mm?
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
Maybe. the machinist will decide if 71mm will clean it up. By the looks of that piston, i doubt it.
True that. Will see what my machinist goes with and get a piston to match.
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
Ouch looks like that was run a long time without an air filter, that is alot of dirt in the bottom end, i would be hesitant to run that without Disassembling that crank and checking the bearing surface's....i bet they are trashed!!!
1985 Tri-Z-
Originally Posted by mywifeknowseverything
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
what shop did you take it to?
This place. http://ricksmachineshop.com/
Looks like .060 overbore is 71.5 mm
$145 for the Wiseco kit. Any other options to purchase at a better cost?
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
Found some great deals on ebay.
Wiseco piston kit $90 shipped
Wrist Pin Bearing $10 shipped
Top End Gasket Kit $19 shipped
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R
_______________________________
1986 Honda TR200 Fat Cat
http://www.3wheelerworld.com/showthr...-Fat-Cat-TR200
1985 Honda 250SX
http://www.3wheelerworld.com/showthr...1985-ATC-250SX
1982 Honda 250R
http://www.3wheelerworld.com/showthr...982-Honda-250R