Esr 310 Kit!! Owner Report

[Crashmore 22]

Has anyone owned a ESR 310? I have never owned any ESR products, so I am looking for owner reports for this cylinder kit. Also, any problems with fit and finish, problems, and bottom end failure due to increased strain? Thanks

[zedicus00]

i got a used one an sent it to be reported, my engine builder said it wasnt by anymeens the best port job hed ever seen.

also i had some fitment problems with the silencer on a trx-5 pipe and 86 style frame.... nuthing a dremel couldnt fix though.

i had a fresh bottom end and havent had problems yet...

[2k2-300exnj]

i have the esr 310 and love it it has the trx9 top end porting and really screams the high rpms

[beerock]

there all pro x jugs, i dont care much for esr's porting. everyone ive ridden had lightswitch type port jobs

[mxracer97]

I have one of their 310 kits with the TRX7 port job. I also have their intake, Mikuni TMX carb, CR ignition, and TRX6 pipe. They also "freshened up" the bottom end when I got the 310. Haven't had any problems with the motor at all. I did have some fit problems with the TRX6 pipe on my Arens frame, but I think that was more of a frame issue. Like beerock mentioned, the port job has a bit of a lightswitch feel to it.

[Crashmore 22]

Thanks for all the input. I didn't know about there porting but I suspected a pipe fitment problem with my Laeger chasis.

[beerock]

Originally posted by Crashmore 22
Thanks for all the input. I didn't know about there porting but I suspected a pipe fitment problem with my Laeger chasis.

is it a protrax narrow frame?

it shouldnt be a big problem. WALSH has problerms with pipe fitment

[deathman53]

I have a esr 330 and the porting is poor. nthing is same, you can look and see that the two sides are ported different, its almost like 2 different people did the porting.

[Crashmore 22]

Yeah it is a narrow frame. So, who would you guys recommend for a big bore?

[beerock]

get a cast port 330 from la sleeve and send it to a good porter, like c leigh or B+B out of deleware

[kwatts400]

Originally posted by beerock
get a cast port 330 from la sleeve and send it to a good porter, like c leigh or B+B out of deleware

Its amazing how good Butch's 310's & 330's ride.

[TampaBoy813]

wheres the best place to find out about the different types of porting...like trx7, 9 and what knot?