Yz250 flywheel weight review
The only thing we’d change on the Wiseco YZ285 is the 19-inch rear wheel. Quite honestly it was a bit stiff and felt too moto for the off-road terrain, though when pushed hard it rewarded the rider with a very positive ride. We spent one of our days on the trail and on the motocross track working with Pro-Action to get a good balance for off-road plushness and mellow motocross duty. They revalved front and back with custom valving and springs. The suspension duties were handled by Pro-Action. The YZ285 is down right explosive when prompted yet is a smooth operator when traction and control are necessary. If you like hard hitting power the YZ285 delivers it with a twist of the wrist and a stab at the clutch. It can be lugged around right off idle and with the smooth clutch action the power is even more controlled. For the woods of Ohio the motor mated well to the tight conditions. It’s odd that with the bigger slug and flywheel weight, top end power only mirrors stock, but again the increased roll-on and heavily muscled mid-range are incredible pluses to the powerband. We noticed a slight increase in vibration with the bigger piston, but it proved to be worth it with the enhanced power boost from low to mid. Luckily out on trail the heavier flywheel weight helps reduce the possibility of stalling and having to kickback. The added compression equals stiff kick-starter action. In the clutch department, Wiseco fits their forged basket, forged inner hub, pressure plate, fiber plates, alloy plates and clutch cover.įiring up the YZ285 is not a task for a weak right leg.
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YZ250 FLYWHEEL WEIGHT REVIEW MODS
With the mods come more power and more heat, so a Boyesen Supercooler water pump kit was fit. The good air in coming in flows through a Boyesen Rad valve and the used air out passes through an FMF SST pipe and Shorty Silencer. To smooth out the delivery of the increased low to mid, an MSR 11 ounce flywheel weight was bolted on. Of course the piston is custom made by Wiseco and the compression of the now YZ285 is much higher than stock. Max Power does the motor work and will tailor the modification to whatever type of power you desire. The cylinder head then gets surfaced to adjust the squish pattern and compression. The cylinder gets ported and power valves cut and massaged. The modifications start with an over bored cylinder (to 71mm (285cc), then the cylinder gets replated with Apticote. The heart of the Wiseco YZ285 is the motor. Wiseco also likes to build bikes, both moto and off-road, which brought us to Ohio, the Wiseco factory, the annual Turkey Run and the Big-bore Wiseco YZ285.
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They forge clutch baskets, inner hubs, pressure plates and a whole line off-the-radar parts for the automotive racing industry. But Wiseco does a whole lot more than just forge pistons at their Ohio plant. When you hear the name Wiseco you think naturally think of dirt bike pistons. Turning a YZ250 MXer into a YZ285 off-road missile