I am gonna check out the schematics on Bikebandit.com and see if they are all the same part number. If so I should be good to go. Thank you.

 

85 110 head


I dont know if they are compatible or not i dont see why not but i dont know for sure.

and no Mywifesquad i have never tried that. it could work but i would rather look on ebay for a good deal on there.

 

Bikebandit is an awesome site to get repro parts BUT they want top dollar for them. also they have a lot of hard parts to find that you really cant put a price on.

 

Thanks, as a machinist I will try just about anything once. I wouldnt want to make a business out of repairing heads, especially since Im not sure if it would work. but I would help some one who wasnt going to ride any other way.

 

I have never been there and will have to check it out. Sounds good.

 

Thanks guys. From what I see comparing at least the 81 and 85 parts llist/scematics is that thetwo head assemblys have the same part numbers/serials. I would think that it would be workable. I have a head on the way for another smokey 82 110 that I have but that may be a ring problem with that one. What made me wonder about compatibility with the older heads on the 85 is that when I bought this other head off ebay they had "for 79-84 110". But it seems that it may work on my 85 110 and at this point I'd rather get that one going. I actually have run into some decent deals to keep me busy this winter. Now I have an 82, 84, and two 85 110's. I also have a 84 200s that is fun. I am 6'5" and usually run about 230lbs and my good running 110 gets me anywhere in the woods I want. Plus if I need to haul it its easy to through up in the truck with the topper on. I found messing and fixing on these is a good way to stay busy during the WI winters. I put up fence for a living as my name indicates but not much going on in the winter. I get to watch my kids grow so thats good. Thanks for the input.

 

If they have the same part numbers its a go. I have ridden off road long enough to remember the origional 90cc atc. Amazing what proper gearing will do. I can still entertain myself on my minitrail 50, and were basically the same size. LOL [img]i/expressions/face-icon-small-happy.gif[/img]

Let us know how it goes and if your interested you could send me that head and Ill see if I could fix it for you. but only if you were going to throw it away.

 

I looked a little more and found out that the valve numbers are different. I guess that must be the diference between the 84 and 85 heads.

 

Maybe they just changed the valves and they will fit in either head. i am not sure, just giving suggestions.

 

The thread size for that plug is M12x1.25 (12mm and 1.25 thread pitch). Unfortunately, HeliCoil does not make a spark plug repair kit in that size (they do make one in 14mm though). The spark plug kit utilizes a self tapping, self thread cutting die that you simply turn in via a socket, remove and install the Helicoil. No drilling is required. In the 12mm size, you will have to use their standard thread repair kit (part No. HC 5543-12) which includes the proper tap (actually a 14mm tap), 5 Helicoil inserts and the special HeliCoil insert tool. I hope you're sitting down for this part, the kit runs about $85 around here (Chicago area). In addition, you will need a 31/64 drill bit prior to using the tap (another $12). It really is simple to do however. I had your same problem on an 1983 ATC 110 and fixed it quite easily. I didn't even remove the head. You have to make sure the piston is on the down stroke so you do not hit it with the drill bit. I put vaseline all over the bit to trap shavings and also ran the vaccuum during drilling. I then put vaseline on the tap so again trap shavings while tapping. I then used a reducer on the shop vac to again vaccuum the cylinder, then shot a few blasts of compressed air to blow out any remaining shavings. I then cleaned the metal with brake cleaner, applied some red loc-tite and installed the helicoil. It worked like a charm and I had no problems with it. I still have the Helicoil kit, if you're interested in it let me know. Hope this helped.