What is your shipping address?

UPS and Fed Ex Use:

Max Power Inc.

7841 Morrison St.

Morrisonville, WI 53571

Attn: Incoming Goods



Max Power Inc.

PO Box 183

Morrisonville, WI 53571

Attn: Incoming Goods


How long does cylinder plating take?

Cylinder repair generally takes two weeks depending on workload and the amount of damage to the cylinder.


How long does it take to have a big bore kit completed?

Big bore kits are typically completed in two and a half weeks, stroker engines take about three weeks.


What about studs, power valves and dowel pins?

For basic cylinder repair, please remove all steel components, if you cannot remove them, Max Power will take them off and put them back on your cylinder for an additional charge.

For big bore kits, leave all steel components attached to the cylinder. Max Power staff members will remove the parts, modify them if necessary, and reassemble the cylinder at no extra charge.


Can you sleeve my cylinder?

Yes, Max Power offers a full cylinder sleeving service as well. We do not recommend this method of repair, but will perform the work if necessary. Many of the four stroke big bore kits Max Power produces are created by implementing a larger outside diameter aluminum sleeve. Once the aluminum sleeve is installed, the bore is then coated with Nickle Ceramic Plating. Nickle Ceramic plating has many advantages over steel liners. Wear resistance, lower running temperatures, reduced friction and better oil retention are just a few of the benefits of plating over a steel sleeve.


Does cylinder repair include a new piston and gasket kit? What about big bore kits?

Cylinder repair does not include a new piston kit and gasket set, however we carry a full line of pistons and gaskets. The advantage to purchasing a piston with your repaired cylinder is that your cylinder will be custom fit to the piston that you purchase. Max Power measures and custom hones every cylinder to exact clearances based on piston size.

Why take a chance of having your finished tolerances any less than perfect? All Max Power big bore kits include a piston kit and gasket set, and will automatically include the custom cylinder honing process.


My piston kit came with too many rings. What ones do I use and how do they go?

Some ring sets that come with our piston kits are used for other applications that require additional rings. The gold or chrome ring always goes on the top with the marks facing up. The black ring is an optional oil scraper ring and goes in the middle. If it is marked then install it with the marks facing up. If there is no second ring land, throw the black ring away, it is not used.


What is the required jetting for my big bore / stroker kit?

The jetting for your kit will be listed on your invoice. In some cases it will not be listed because it does not vary from stock. It is impossible for us to give you exact jetting specs for every year machine with every year head cam and porting spec, but what we list will get you close. We also are available Monday through Friday to help you get it dialed in. Please have your invoice # handy so we can reference it before giving assistance. For a handy jetting guide we found on the internet click here.


Is there a special install procedure for a big bore or stroker kit?

Typically our kits will install the same as OEM parts with the same torque specs. Depending on the kit you purchase there may be extra work required to make a kit fit properly. The main thing to remember is DO NOT FORCE ANYTHING. If it does not fit then stop and call us. We are modifying the engine and making it bigger. This means we are filling up the gaps in the engine with bigger parts. Sometimes the case castings vary and it is necessary to clearance them a bit for proper fit. Sometimes parts flat out need to be modified. Here are some rule of thumb measurements to help you out. Keep a minimum of .005” for static parts (piston skirts to cases), a .030” gap between rotating parts(rod to case), and a gap of .025” for reciprocating parts(piston to case). If you have questions call us.


What kind of oil should I use?

For 4-Stroke engines we recommend high quality petroleum based motorcycle oil. Many of the non-synthetic OEM engine oils work well and allow the rings to seat quickly. Do not use full synthetic or semi-synthetic oils for break in they are too slippery and keep the rings from seating on the bore. For 2-Stroke engines we recommend Yamalube R mixed at 32:1, we have no confidence in wild 50:1 or 80:1 claims by oil manufacturers. Oil is cheap and piston and cranks are not.


What is the break in procedure on my new engine?

When starting a cold engine NEVER rev it up higher than a fast idle. Put a fan in front of you radiators and blow air through them. Get the engine started and let it idle until the water in the radiator is as hot as the water you would wash dishes in, stop the engine and let it cool off. Do this 3-4 times. After this is done ride your engine under light loads varying the rpm but do not go beyond ¾ throttle until you have about 30-45 minutes on the engine.


What octane fuel should I run?

In most cases we recommend a 50/50 mix of 110 octane race fuel and premium pump fuel for about a 100 octane rating. Engines run the best and make the most power and run the hardest with just enough octane to prevent detonation.


How long should I go before changing my piston?

There are way too many variables involved for us to give you a blanket time frame for piston changes. Air filter and engine oil maintenance (or lack of) as well as, intake tract condition, riding conditions, jetting, riding style, and fuel used all plays a huge role in engine life. What we can tell you is that DIRT, HIGH RPM’s, and TIME are the main killers of off-road engines. Too much of any of these will kill your engine.

Two strokes are the easiest to monitor because we can measure the compression. Measure the compression when the engine is fresh and document it. Then periodically check the compression of the engine with the same gauge. Once the compression drops about 10% it is time to change the piston. For more details click here.

On four stroke engines it is necessary to tear down periodically and inspect piston to wall wear and ring wear. Initially we recommend following the OEM specs. This is usually 12-15 hours of run time. After inspecting and calculating wear a more accurate maintenance schedule can be determined. It is always better to tear down early. Follow your OEM manual for wear limits. Feel free to call us if you have questions about your kit. Please have your invoice # for easy reference.