1983 ATC 250r Restoration

[brandonlowe2]

Took a gamble on an '83 250r that supposedly has a strong good running engine..... the reason it was a gamble is because it has no carb so I couldn't crank her up and run it before buying. When I purchased it, I was made aware that it needed a new muffler. Shortly after that, I was told about the carb. When I received a picture I found out about the cut plastics for paddles (why do people cut the plastics anyway?) and when I went to pick it up I was told about the lack of throttle cable. SO.... hopefully this was not a bad deal.... but, we shall see. The engine turns and seems to have good compression, so hopefully it is just a matter of getting the carb back on. I was able to locate an OEM '83 carb and it arrived and seems to be in good condition. I need to buy a carb rebuild kit because I don't have jet or needle.

Here is what we are working with.....

[yaegerb]

not a bad deal IMO depending on what you spent. Its got newer tires and I spy a sectional expansion chamber.

[atc300r]

That has a 300 topend on it. The intake is aftermarket DG maybe you can buy new boot for it if that one is rotted or cracked. I think the pipe is White Bros. Tool box is 85-86 250r.

[brandonlowe2]

thanks for pointing out the goods guys.... The guy had taken it to a Honda dealer.... spent around $700 with them but he claims they put the wrong carb on it (some chinese carb) and he didn't like it... took it off and due to having knee surgery never got around to getting the right carb. The dealer put new tires on and did few other things to spruce it up..... I basically paid what he paid the Honda dealer (which he gave me the receipt from them) He said it ran fine even with the Chinese carb, but it was not like it should be with the correct carb. I will know soon enough.

[atc300r]

Your intake looks like it has an intake for a bigger carb than the stock 30 Keihin.You can buy bigger or smaller boots aswell.I bought a boot for a 34 mill carb for $10 brand new.34 mill Keihin from 85-86 250r work well with these 300r topends when you get them jetted. Some guys run a 38-39 mill carbs with porting on there 300r.

[brandonlowe2]

Your intake looks like it has an intake for a bigger carb than the stock 30 Keihin.You can buy bigger or smaller boots aswell.I bought a boot for a 34 mill carb for $10 brand new.34 mill Keihin from 85-86 250r work well with these 300r topends when you get them jetted. Some guys run a 38-39 mill carbs with porting on there 300r.

ah... glad to know I am dealing with a not stock trike. I guess the carb I bought then is no good to use. I will hunt for a 34 mill Keihin... thank you

[brandonlowe2]

This is the one I bought and was hoping to use..... http://www.ebay.com/itm/83-84-Atc250...vip=true&rt=nc

[atc300r]

You could get a new boot to fit the 30 keihin. The 300 kit was designed to run with the stock carb and pipe it came with a #135 jet. Measure your intake boot across the inside see how big it is in mm.

[brandonlowe2]

Ok I will check the mm on the boot and report back. I got a DG muffler to go on it.... the pipe I guess will work but man it is rusted out bad. I just ordered a carb rebuild kit.... not sure what jet it includes, might need to buy a #135 jet

[brandonlowe2]

This is probably a stupid question..... but because it has the 300r top end.... is it possible that the other "conversions" required to make this a 300r would have been done to this trike as well?

[atc300r]

The 300r kit is a bolt on and go kit.

[brandonlowe2]

so... would this trike in fact be referred to as a 300r?

[RIDE-RED 250r]

so... would this trike in fact be referred to as a 300r?

Yes.

I would say you did pretty good, especially with the 300 kit. Trike looks to be pretty solid where it counts. I see you got a Kenda Front Max up front (good choice) and looks to be Kenda Dominators on the rear. Should be a good combo. I have run the Dominator rears and I think that while similar in tread design to ITP Holeshots they are a bit harder compound of rubber and not quite as grabby as Holeshots. Not a bad tire though for a sport machine.

atc300r: Was HRC (Honda) the only source of a 300 kit for the Air-Hammers? Or where there aftermarket kits out there as well?

[brandonlowe2]

Ok that is great.... yea, at first I was a little worried when I picked it up, but you guys have helped ease my nerves about it and I am looking forward to this beast now..... I have become friends with the guy I bought it from (same guy I bought the 250sx from) and I told him about the 300r kit... he had no idea lol. I told him thats probably why the carb he had on it was not working right

Yea I really like these tires... I can't wait to try them out. I am kind of thinking about replacing my tri-z tires for these (I have Scorpions on it and can't power slide easy, but maybe thats just me not knowing how to ride!!! haha)

Is this what I should be looking at? http://www.ebay.com/itm/Carburetor-F...JYDXdy&vxp=mtr

[RIDE-RED 250r]

It's a darn good carb, but you are going to have a tough time squeezing it into an intake designed for a 34mm carb, it can be done, but it's not easy. A U.P.P. intake makes installing this carb on a 3rd gen MUCH easier as it is bigger and has a slightly different angle but not enough to throw it too far off alignment with the airbox pipe. You also need to get the correct throttle cable for this carb, no OEM cable on any generation 250r is compatible..

I'm going to defer to atc300r on whether or not that carb will fit on your trike as he has substantial experience with the Air-Hammers and I have virtually none.

UPP intake: http://www.eddie-sanders-racing.com/...p%20intake.htm

NOTE: The UPP intake is advertised as a better intake to fit larger carbs on 3rd gen ATC's and TRX 250r quads (the liquid cooled R's)... I do not know if this will be compatible with your Air-Hammer. I'm pretty sure that swapping a 3rd gen intake and reedblock is a popular upgrade on the Air-Hammers, but I'm not 100% on that so again I would defer to advice from atc300r on that subject.

Just noticed: the price on that new PWK38 is very cheap...almost suspiciously so... Most I see from reputable vendors are closer to $200.