stroker in mx?
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Thread: stroker in mx?

  1. #1
    Senior Member fastR of puppets's Avatar
    Join Date
    Dec 2007
    im doing a long rebuild on my R right now, and currently the plan is by the end of the winter, the engine will be a esr 310 pv, cr250 ignition, LRD standard bore pipe, 38mm tmx, and vf3s. So being the powerhungry person that i am, im still lookin for more power,so i was thinking about a stroker, ive heard that its alot more torque, but it also takes away rev speed, so which do you think would be better for mx, stroked or stock
    2008 Special Edition LTR-450
    2000 Laeger Pro-trax cr500 link 250r-no longer for sale. soon getting 350pv stroker
    1988 Honda TRX 250r
    2006 Yamaha Blaster
    2007 Honda CR250r

  2. #2
    Moderator Teddy250R's Avatar
    Join Date
    Dec 2007
    Gouverneur, NY
    Personally, I believe a stroker would be too hard to ride on an mx track, they are aweful torquey but others may chime in. In my opinion, I believe a stock stroke long rod is the best set-up for MX, especially if you are running a bigger bore or even a Pro-X.


  3. #3
    Senior Member Michael88R's Avatar
    Join Date
    Dec 2007
    Tulare, Ca
    I would leave the stock stroke. If you want more power, just go with a 330 instead.
    88 TRX250R, ESR 330PV with TRX7 porting, ESR TRX5 std. mount pipe, CR reeds with 38mm Mikuni TMX, Roll Lobo II front end, OEM swingarm, Motowoz front shocks, Elka rear shock, PRECISION Stabilizer, Lsr axle.

    06 TRX450ER, Duncan 470 national kit, Roll Design A-arms, Motowoz shocks front and rear, Houser XC rear linkage, CCP stabilizer, IMS-Roll Pegs and heal guards, Rpm axle.

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  5. #4
    Junior Member 88mxR's Avatar
    Join Date
    Jan 2008
    Joliet, IL
    I have a stroker in mine, but I have only had a chance to ride it in the dunes and snow. The power is a lot different. There is a lot more torque and it doesn't rev as fast. I think that would be great for the track. I am running stock ignition though, it may be a lot different with a cr ignition.
    The stroker isn't as simple as it seems. I had to cut the cases for the rod to clear and I had to cut the bottom angle of my 88 piston. 86 pistons don't have that problem. Also you will have to mess with gaskets or cut your head or cylinder to get the proper squish back.
    For competitive motocross, you may not want the cr ignition because it creates more wheel-spin.
    Another thing, my sparks mx pipe did not see to work as well once I had the stroker in. My brother's SST seemed to give a lot more top end, but that isn't always good in motocross.
    250r - 2001 PRD Frame, Janssen +2 LT, Axis fronts, Walsh CR500 link swingarm, Ohlins rear, 450r front hub assembly, LSR axel, Tag bars, FiveONick mx port, Mumm's cut/domed head, 38mm Keihin AS, Boyeson reeds, Sparks pipe
    CR250 - Pro Wheels wheels, Tag bars, Sunline levers, Mumm's mx port, Mumm's cut head, Pro Circuit pipe, V-Force reeds


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