Duncan CT or ESR?

**Fox250R** · 02-16-2016, 03:01 PM

So I'm looking into getting maybe a 310 or 330 kit and I wanted some of your guys options on who I should go with company wise. I was thinking either Duncan, CT or ESR. Any thoughts?

ESR has a 330 PV with pipe and Carb for around $1400!

Thanks in advance

**yaegerb** · 02-16-2016, 03:43 PM

IMHO I would get a blank cylinder from ESR or CPI and send to Jerry Hall, Arlen Lehman or Rob Selvy.

**ONEBAD350X** · 02-16-2016, 06:06 PM

Originally Posted by yaegerb

IMHO I would get a blank cylinder from ESR or CPI and send to Jerry Hall, Arlen Lehman or Rob Selvy.

This is just what I was gonna recommend!

**250rRoostmaster** · 02-17-2016, 09:39 AM

I know you didn't mention him but, LED Performance all the way and he's local (Gresham)!

**yaegerb** · 02-17-2016, 09:40 AM

Originally Posted by 250rRoostmaster

I know you didn't mention him but, LED Performance all the way and he's local (Gresham)!

I got Arlen in my three....look above.

**Fox250R** · 02-18-2016, 05:59 AM

LED is just down the street from me like a mile away.

**yaegerb** · 02-18-2016, 10:49 AM

wait a tick....you have Arlen's shop a mile from you and you are asking about Duncan/CT/ESR....um, pretty sure I would be walking to Arlen's on a daily basis.

He can order CPI cylinders as well.

**atc300r** · 02-18-2016, 11:30 AM

LED has some good videos of Arlans work and of him working in his shop on Youtube.

**The_Steve_Man** · 02-18-2016, 11:50 AM

Arlen does some nice work with ESR cylinders.

**Fox250R** · 02-19-2016, 05:19 AM

I've heard mix reviews about Arlan but I dunno. I might go with the PC2000 cylinder and see how that works out.

**christph** · 02-19-2016, 06:53 AM

I have a PC 340 from Duncan. It's a high quality cylinder and I've had it for years with no problems. Here is a picture of it.

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**yaegerb** · 02-19-2016, 10:15 AM

Originally Posted by christph

I have a PC 340 from Duncan. It's a high quality cylinder and I've had it for years with no problems. Here is a picture of it.

That is a gorgeous 250R!

**Fox250R** · 02-19-2016, 09:20 PM

Originally Posted by christph

I have a PC 340 from Duncan. It's a high quality cylinder and I've had it for years with no problems. Here is a picture of it.

Always loved the 88s colors!

So ya, the 340 PV was the same one I was looking at? Can you still ride trails and stuff? I'll be doing both dunes and trials. How's the power feel? I don't need anything crazy. I was looking at the 310 at first but it's the same price as the 340! Did you have to machine your case?

**Fox250R** · 02-20-2016, 03:01 AM

Did some more research on this. The 305cc and 340cc motors are around $1800 and cases need machining. How much will that cost just for the case mod? Now the 265cc and 275cc are like what $100 less but no machining is required. I'm leaning towards the 275cc tbh.. Just not sure for $1800 how much faster will a 275cc be compared to my current motor? Need to think about this more I guess lol

**BOB MARLIN** · 02-20-2016, 10:50 AM

Bypass the 310 and go strait to the 330. The torque is better with the 330. Run a digital temp gage also. You will be shocked on how hot the big bores run in a trike. They run cooler in the quads- more room for air to move around the engine and bigger rads.
I think porting a stock cylinder will give you more performance than just going to a 275cc.

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Duncan CT or ESR?