Heres the low down i took this engine out of a 86 atc 185. It had not been run in about 5 years, but the guy said it ran good at that time. I put it (along with the wiring and electronics) into this BSR that i build. It will fire up and idle all day long (seriously ive had it idleing for about 2 hours) but as soon as you try to ride it the thing spits and sputters like its running out of gas. I dont belive that is the case as playing with the choke does not change anything. Also i have tried a few diffent fuel tanks to make sure that was not it, and the same thing with all of them. (All the tanks are vented.) so my question is......is there a known failure on these things for symptoms such as mine? Somthing that would let it idle fine but not run correctly under load? Weak coil mabye? Also i have cleaned the carb. i havent checked for spark becuse it happens so quick and it will always start right back up.

 

Ive tryed raising and lowering the clip, thus moving the needle up and down. it seems to run the best with the clip in the middle notch. could it simply be that the jetting is way off due to the fact that im running an "open" air box, rather than the stock one. Anyone ran a pod type filter? have to rejet?

 

one more thing does this engine require a certian amount of backpressure? Becuse i did put a diffent muffler on it as the original was in poor shape. The one that i put on has a Slightly smaller Inside diameter, but its basicly just strait through with no ristriction.

 

pull plug and see what it looks like my quad with a pod filter and gutted pipe had to be rejeted to run right and then aagain when i put the wright brothers pipe on

 

5yrs of sitting. ill bet its gona need to have the carb gone though. gaskets dryed up, rotted, and evon holes plugged by bad gas.

 

replace the carburetor & it will run fine.

 

You don't mentioned about ur enthisusiam. you c=are requested to change ur carborator........... but still you dont mentioned about it........ shipping