Author Topic: esr or prox 350 or 370 kit for atc250r (Read 17750 times)

96motorhead · « **Reply #15 on:** August 19, 2014, 06:20:01 PM »

The biggest complaint I hear about the esr stuff is the wiseco cranks. So from what you guys are telling me and from other information i've gathered a esr 370 cylinder with a hot rods stroker crank, running on 110 fuel and have it hand ported by a pro I would have a good strong running reliable motor?

etccb · « **Reply #16 on:** August 19, 2014, 06:36:23 PM »

They do not use wiesco cranks they have hotrods or can rebuild oem. The hot rods are 4mil strokers so you will be looking at a 363 with one of those vs having a custom crank made to get a 370. For your use the Eddie ported trx9 race gas setup will surprise a lot that think different. Also with these big bores you should do a stinger mod to your pipe or go ahead and get a trx9b or trx5b or other bb type pipe.

matuus · « **Reply #17 on:** August 19, 2014, 06:53:03 PM »

Hit me up 96motorhead in SoCal. Our group rides Glamis Oct to Mar every year. Bunch of 250r's to rip around Glamis sand.

96motorhead · « **Reply #18 on:** August 19, 2014, 07:19:17 PM »

Well what do you guys recommend for pipes for this setup? I was thinking paul turner high rev. We have a paul turner high rev on one of our atc's and it hauls so I was leaning towards that. Also I don't want to spend more than like 600 bucks for a pipe/silencer , so it doesn't need to be the best pipe on the planet.

aberegg05 · « **Reply #19 on:** August 19, 2014, 08:08:18 PM »

I have the 330 +4 esr cylinder trx9 port with the trx9b pipe. I was really suprised with the performance. I've rode a pro x 363 CT and not much difference between the two.

etccb · « **Reply #20 on:** August 19, 2014, 08:31:32 PM »

trx9b or trx5b are fantastic pipes. 5 is smoother 9 has more of a hit toward top.

kb250r · « **Reply #21 on:** August 19, 2014, 08:53:42 PM »

Fyi going in ATC guys

Sand_Blaster · « **Reply #22 on:** August 19, 2014, 09:50:01 PM »

Your best bet would be to get a pipe built for your motor. I "think" most atc pipes available will hinder your new motor a ton.

The_Steve_Man · « **Reply #23 on:** August 19, 2014, 10:04:29 PM »

Jerry Hall said in another thread that the PT Hirev was designed for a stock cylinder. The only new pipe that has come out is ESR. You would have to ask Eddie how well it would work with that cylinder
Arlan at LED wil make a pipe for $850. I am sure it is worth every penny. I was going to get one but due to unforeseen circumstances I will have to put that in hold.

etccb · « **Reply #24 on:** August 19, 2014, 10:07:25 PM »

ooopps I was talking trx on the pipes and I dont know the atc avail pipes as well.

kb250r · « **Reply #25 on:** August 19, 2014, 10:11:55 PM »

Shoot 69-ss-396 a pm,he runs a pt hi rev on a 363 and she runs hard .

96motorhead · « **Reply #26 on:** August 20, 2014, 12:08:41 AM »

Ya I have an atc250r. Also I'm very skeptical about the esr pipe because I've heard they have great power but the pipe finish is just horrible and flakes off after a while. I heard about some guys getting some in frame drag pipes from a company called shear I think, they said they only paid like 500-600 dollars if I remember correctly. Has anyone ever had experience with shear in frame pipes?

Rupp250 · « **Reply #27 on:** August 20, 2014, 12:31:42 AM »

Mat Shearer is who you are thinking of. One of the best pipe builders out there. I'm not too up on what is available for the ATC pipe wise.

FWIW I run a Shearer out of frame drag pipe on one of my bikes.

I am also running a regular TRX5 center mount on a 363 Sphinx. Non big bore pipe. yes the chrome finish from ESR is lacking. Wish we could get them raw.I eventually sand blasted mine and hit it with Hi-Temp Ceramic paint used on headers.

udontknowme · « **Reply #28 on:** August 20, 2014, 01:52:21 AM »

if you need a pipe made your best bet is to find someone thats familiar with that particular engine and has made pipes for it before. they will likely have some good insight on what works. the best pipe maker really doesnt meen much if they have no experience with that engine, as it would pretty much be a shot in the dark for them. and without time to test and develop it further beyond the initial first design, most likely it will only perform on a mediocre level. im sure arlen, jerry and eddie would all tell you the same thing. takes time to get a pipe working really well. ive went through this stuff before when cpi made a pipe for me. good chance it might of been the first pipe he ever did for a old ktm. with one chance to get it right, the odds werent in his favor. ya it works and runs ok but i have no doubts if a sent him a pile of cash he could develop the pipe further and get more power

etccb · « **Reply #29 on:** August 20, 2014, 10:05:49 AM »

Quote from: Rupp250;41309

I am also running a regular TRX5 center mount on a 363 Sphinx. Non big bore pipe. yes the chrome finish from ESR is lacking. Wish we could get them raw.I eventually sand blasted mine and hit it with Hi-Temp Ceramic paint used on headers.

You can get them raw. I have read where someone purchased raw and show chromed instead of the cost effective protecting std coat.