atc 250r pipe and silencer

[william16339]

i have an 85 250r, that will have a top and bottom rebuild..itll have a ported cyl, ( Deabating on cr250 head gasket) boysen reeds, 38mm carb, ect...i have a fatty pipe on it now, and a fmf silencer. that should be fine right? i know the fatty isnt really that great but im just wondering if for porting and stuff if it will be good, thankyou

[RIDE-RED 250r]

I used to run the Fatty pipe and Powercore silencer with my old stock unported cylinder, better reeds and the 38 AS carb. It ran pretty good, but it switched off rather quickly on upper mid to topend. Not a bad system persay, certainly better than DG (if they even still make ATC250r exhaust) but there are better out there.

I like my ESR system very well. And alot of other folks also swear by the Paul Turner pipe too. These are about your best 2 choices for mass produced systems. Then there are custom sytems, whole new ballgame. NOS350x makes a really nice looking OOF pipe. Hear alot of good things about Shearer's custom pipes too...

[william16339]

thanks man lol,,but it wont do good on top? even if its ported? and a carb thats like more like topend

[pcs]

a low/mid range pipe will work but not well for a high rpm port job and carb. mix match part will not get you the most out of them. you set up will work better than stock but the fatty will hold back some hp.
ride red: how do you like your esr pipe, any complaints?

[william16339]

yeah its a midrange port job so i should be fine

[ceaserthethird]

Just try it out, if you don't like it. Save up for a better pipe.

Ct racing, Paul Tuner, ESR, Jemco.

[RIDE-RED 250r]

a low/mid range pipe will work but not well for a high rpm port job and carb. mix match part will not get you the most out of them. you set up will work better than stock but the fatty will hold back some hp.
ride red: how do you like your esr pipe, any complaints?

Perforance wise, it's the best I have ever owned. But I don't have as much experience with as many different systems as others in here. I have owned the FMF system and had a little bit of run time with a DG. My only complaint and it's relatively minor is I have a couple small chips in the chrome plating after about 10 hours ride time. They are very small, like the size of a pencil erasor. It's holding up better than some I have heard of in the past. But, it is mounted on a trike after all, and that front wheel puts the pipe under constant assualt of stones and such. I went with the standard mount system and fitment was very good. I had to slightly modify the right front corner of my engine skid plate (with a hammer) so the expansion chamber wouldn't contact it. It was only necessary becuase it is a FAT pipe. Overall, I'm very pleased with it.

William: If you are porting for lo-mid, running the 38mm carb isn't going to hurt you that bad. Do the low-mid porting, run a reed spacer, the FMF Fatty and if you can run race fuel do the head gasket mod. I garantee you will LOVE the midrange with that setup! And it still won't be "slow" on top...

[william16339]

im setting it up for mid to top..its a mid to top port, 38 mm carb, same pipe for now, but the cr 250 headgasket im still debating

[RIDE-RED 250r]

The FMF shouldn't do bad, it's a real descent system. But like I said, there are some better options out there. If that's what you have right now then give it a try with your mods. If you don't like it or just want to try something else you can down the line....

[william16339]

exactly thanks man