Unveiling the Key of Reliable and High-Performance Two Stroke Porting by Pro Circuit

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Looking to maximize the power and reliability of your two stroke dirt bike? Think porting work is not for you? Think again as in this video I sent my 1999 KX250 Cylinder and head to Pro Circuit for porting and head work.
Jake from Pro Circuit tells us what they did and where you can expect performance gains from their in house cylinder porting and cylinder head cutting.
www.procircuit.com/motor-serv...
This is a continuation of my 1999 KX250 Pro Circuit Splitfire build. Catch the remainder of the videos here, including the tear down, engine tear down, and suspension videos.
Part 1: • New Two Stroke Project...
Part 2: • SOS I Need Your Help |...
Engine Tear Down Part 1 Video: • See How Easy It Is To ...
Engine Tear Down Part 2 Video: • 92-04 Kawasaki KX250 E...
Engine Tear Down Part 3 Video: • How to Split Cases on ...
Pro Circuit Works Suspension VS OEM: • The Shocking Truth: Pr...
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16 авг 2023

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Комментарии : 22

@justinmoock7506 4 месяца назад

I have a motor I sent to pro circuit years back(2006 kawi KDX200)and had them do mod001(porting&head mods). I will say that this engine couldn't be more perfect. When I took the headlight and tail light off and put the "KX kit" plastics on it,every person that has ridden it thinks it's a kx-250! This engine is absolutely sick. It has an angry powerband that is super responsive. On the down side I have to run very expensive leaded race gas at a minimum of 112 octane,but other than that,I can VERY HIGHLY recommend pro circuit to do it motor work

@zodzod9378 11 месяцев назад

Good power old is the new NEW love it ! Little john from the UK

@michaelgarland579 29 дней назад

I have yz125 2003 an apex head an lectron carb now its dangerous fast

@chrisr.1391 11 месяцев назад

Let’s go!!!!

@GregHitchko 11 месяцев назад

One of the things I'm most excited about!

@builtfordtough4499 10 месяцев назад

They changed next to nothing. All they did was smooth the casting.

@GregHitchko 10 месяцев назад

I should have sent it to you then haha!

@builtfordtough4499 10 месяцев назад

@@GregHitchko Yeah I got one here that Mitch ported back in the day. Cut base, raised transfers and exhaust. Enlarged booster transfers to max. Larger exhaust sub-ports and the hooks in the transfers you would have to see to believe.

@mid-ohioguardian6927 7 месяцев назад

The guy in the vans shirt didn`t know anything !!!!!!!!!

@user-nh5sq8dy7n 6 месяцев назад

Hahahaha look at @builtfordtough4499 talking like he’s better then pro circuit then u click on his pic of duct taped numbers and 2 feet of air with the style of a drunk Jeff Stanton in the late 80s lol…… I think pro circuit did a little more then smoothed out the cast lol

@BillyWillicker 27 дней назад

@@user-nh5sq8dy7n To be clear. They did very little in that cylinder. What you see in the video in that cylinder is considered a clean-up port and replate. It will run better than a stock cylinder but only slightly. The work done to the cylinder head is where the improvement really comes from.