New to the board
Arm chair racerNew to the board
Hey guys, I have a mid 80s Polaris Indy 400 liquid cooled that has a fresh top end rebuild and new gaskets but will not run correctly. Plugs foul easily, it has a low end bog and a top end bog as well. Mid range is okay but it is driving me crazy having no power. I want to be able to hop on it and rip across a field just like all of my other sleds. Any help and advice would be greatly appreciated! Thanks.
1985 Honda 250es Big Red (Daily Driver)
Multiple Honda ATC 90s and 110s
1984 Honda 200s
1983 Honda 185s
At The Back Of The Pack
Arm chair racerAt the back of the pack
New reeds? Fuel pump and filter get rebuilt? Carbs got rebuilt and synched properly?
New to the board
Arm chair racerNew to the board
Yes. I don't believe it has reeds.Originally Posted by shovelryder
1985 Honda 250es Big Red (Daily Driver)
Multiple Honda ATC 90s and 110s
1984 Honda 200s
1983 Honda 185s
At The Back Of The Pack
Arm chair racerAt the back of the pack
My bad on the reed part.......Sounds like a state of tune carb issue for sure though.
New to the board
Arm chair racerNew to the board
That's what I thought too but I've done everything I can think of. Needless to say it's for sale haha
1985 Honda 250es Big Red (Daily Driver)
Multiple Honda ATC 90s and 110s
1984 Honda 200s
1983 Honda 185s
At The Back Of The Pack
Arm chair racerFirst time rider
Crank seals? Did you pressure test the bottom end?
First Time Rider
Arm chair racerNew to the board
+1 for crank seals me and my buddy rebuilt his older Indy and could never get it running right no matter how we jetted/tuned the carbs. It was doing the same thing as you say yours is, guttless bottom end and top end. As 86 350x said definitely test the bottom end.
Quads:
2004 Ltz-400
2012 Ltz-400
Trikes:
85 ATC 250r
85 Tecate
82 Tri-moto 125(The wheelie machine)
85 ATC 70
85 ATC 110
84 Zinger
Bikes:
03 Rm 60
Sleds:
05 f5 Firecat
78 Lynx 275
Just Too Addicted
Arm chair racerJust too addicted
+2 for crank seals.....if you are planning a leakdown test on 30 year old crank seals then you have already answered your own question...it needs them. You don't need to remove the top end again however. Pull the engine, remove the clutch, flywheel, and stator. Then you can remove the lower crank case half, lift the crank up a bit, removed the old seals, slide the new seals on and re-seal the case halfs.
Don't worry...just run watcha brung...
At The Back Of The Pack
Arm chair racerFirst time rider
Spray soapy water & look for air bubbles. Do you trust your machine shop; did you check your cranking compression? Air Leaks
This type of question goes out on most every rebuild. If you’re a regular reader you should already know what to do.
John Tice
503-593-2908 Alternate 541-508-3944
www.smallenginemachineworks.com & www.nwsleeve.com
Turning Custom Cylinder Sleeves Since 1971
Got The Holeshot
Arm chair racerJust too addicted
How's the clutches? Very well still good be a motor related issue, but clutches often get overlooked.
Rides:
1985 250sx
1982 ATC185s
1984 200es
Always Hoping For a Maritime Trikefest- http://www.3wheelerworld.com/showthr...s-where-you-at
"Wear Limits Are Just A Suggestion"
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