Author Topic: Duncan racing VS Dynoport porting  (Read 930 times)

Offline 98 LT250R Hybrid

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Duncan racing VS Dynoport porting
« on: July 02, 2018, 02:42:59 pm »
Looking for feedback on dynojet and duncan racing porting.  I mainly ride motocross, and will be running a dynopoet pipe.  But i also am looking for high power numbers as well.
1989 LT250R
2016 YFZ450R suspension, bead locks, gncc tires, white carbon fiber look plastic, motocross ported motor, decked for race gas, V-Force 3 reeds, 39mm PWK, Hinson clutch basket, FMF pipe and silencer.

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Offline Motoman991

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Re: Duncan racing VS Dynoport porting
« Reply #1 on: July 03, 2018, 09:14:11 am »
I've never heard of any Duncan Engine making high numbers.  I assume most people hear about them because they pay DirtWheels to constantly do articles about them.  That's how I first heard about them.

I never knew Dynoport did porting.  I've only heard of them making exhausts.

There's plenty of engine builders that do porting.

Offline All American

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Re: Duncan racing VS Dynoport porting
« Reply #2 on: July 17, 2018, 12:20:37 am »
Yup....— no shortage of garage do it yourselfers willing to do a “porting job”, but only a handful of people I’d trust with my motor.  Iceracer, HPR, and a couple others on this website.  Just be careful who you pick to do your work.  You want somebody who has experience with these quad racers to get the best fitting port job for your riding style and your environment.
1-1985 SUZUKI LT250R
1-2013 HONDA TRX450ER


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