Powroll general product information

GENERAL INFORMATION ON POWROLL PRODUCTS

This is general information. Click "Products" link above for specific items.

'Race Gas Required' or 'Race Gas Mix Required' means high octane!

Some new fuels designed to get the best power possible from STANDARD compression engines might not be high octane.

Occasionally, you will hear people say oxygenated fuels are the only fuels you should run in a four stroke -- NOT TRUE. You should match the fuel octane to your compression ratio, no matter what 'type' of fuel you use.

This also applies to Aviation Fuel, which is not designed for ATV and Motorcycle applications. Although aviation fuel octane ratings seem high enough for safe use in high compression engines, their rating scale is different.

Rule of Thumb:

If it's OK on premium pump gas - lower octane specialty fuels OK.

If compression is too high for premium pump fuel - DO NOT run ANY lower octane fuels.

If you'd like to learn more about octane, check out our Tech page.

For information about specific companies fuels: Nutec Sunoco (Cam2) Trick VP

This is general information. Click "Products" link above for specific items.

Powroll piston kits are listed in one of four ways:

HIGH COMPRESSION PISTON

These are stock sized pistons with a taller dome. This kit will increase compression but not displacement.

REQUIREMENTS: Installs in place of your stock piston. No boring required, but clearances should be checked.

OVERSIZE: Some of our kits have oversizes available, these will be listed below the base kit as "BORE KIT - OVERSIZE FOR ABOVE"

BORE-IN KIT

This kit includes a piston that is larger than stock size, but will bore into the stock cylinder sleeve.

REQUIREMENTS: Your stock cylinder will need to be bored to fit the Powroll piston.

OVERSIZE: Some of our kits have oversizes available, these will be listed below the base kit as "BORE KIT - OVERSIZE FOR ABOVE"

RE-SLEEVE KIT

These kits increase the size of the piston past the maximum reliable limits of the stock sleeve. A larger sleeve is included with the kit.

REQUIREMENTS: Your stock cylinder will need the sleeve removed, the cylinder bored to fit the Powroll sleeve, the Powroll sleeve pressed into the cylinder, and the Powroll sleeve bored to fit the Powroll piston.

OVERSIZE: Some of our kits have oversizes available, these will be listed below the base kit as "BORE KIT - OVERSIZE FOR ABOVE"

RE-SLEEVE KIT REQUIRING CASE MACHINING

These kits require a sleeve (see Re-Sleeve Kit), but the new sleeve is larger than the opening in the cases.

CYLINDER CORES

We do not stock cylinder cores. You will need to provide your own cylinder.

BORING & RESLEEVING

If you provide us with your zip code, we can give you a list of shops in your area that offer these services. Powroll does not offer resleeving, but can bore cylinders for Powroll piston kits on a limited basis.

STROKER CRANKS S

This is general information. Click "Products" link above for specific items.

DOWNLOAD OUR STROKER INFORMATION BOOKLET

Includes complete info about what a stroker is and how to order one.

Powroll stroker cranks are listed in one of three ways:

STROKER

Part# will be all numbers, no letters

The price shown is to do the stroke work on your good stock crank assembly. It does not include ANY parts. If your crank needs a new rod or other parts, it will cost extra.

If your crank is more than 2 years old, expect to need some replacement parts.

STROKER WITH NEW ROD ASSEMBLY

Part# will end in ‘RA’

This price includes the work on your crank, a new rod, pin, and bearing. If other parts (cam sprocket, main bearings, etc) are needed, that will cost extra.

STROKER WITH HEAVY DUTY ROD

Part# will end in ‘R’

This is the stroke work with a stronger rod. Pin, bearing and other parts are not included in this price.

SHIPPING A CRANK TO POWROLL

WHAT IS A STROKED CRANK?

Strokers create more displacement (and generate more torque!) by relocating the crank pin further out on your crankshaft’s flyweights. If you'd like more information on how a stroker works, click here.

Stroke work is done on your good crank assembly. You send us your crank assembly (with all pressed-on parts), we do the work, and send it back to you assembled and ready to install.

CRANK CORES

Powroll does not have crank ‘cores’ in stock. You will need to send in a crankshaft. Turn around is typically 2 weeks, except during busy times, when process time can increase to 4 weeks or more. Call or email us to find out what current turn-around time is.

Fine Balance, Crank Pin Welding, and other Specialized Services

All Powroll strokers are aligned to very exacting specifications (more stringent than most OEM requirements!). Additional services (like fine balance, etc.) may be available as time allows. Cost for these additional services is based on time and materials. Please call us for an estimate.

& HARDFACED ROCKERS

IS YOUR CORE GOOD? SENDING CORE FOR CREDIT

This is general information. Click "Products" link above for specific items.

Powroll cams listed in one of the following ways:

BILLET

Made in the USA from all new materials, no core is required when purchasing a Billet camshaft.

Contrary to popular belief, we have found no quality difference between a US-made Billet cam and a US-made hardweld cam. Damage to most camshafts can be traced to oil issues (low oil, no oil, bad oil), incorrect valve springs, or installation issues.

Powroll does not recommend, sell, or install performance camshafts made anywhere but the US.

HARDWELD WITH NO CORE REQUIRED

These camshafts are made by adding material to a stock camshaft, then grinding it to our specifications. They are finished by adding a hardface material to the surface which is thicker and stronger than the stock coating.

HARDWELD WITH CORE CHARGE

Made by adding material to a stock camshaft, then grinding it to our specifications. They are finished by adding a hardface material to the surface which is thicker and stronger than the stock coating. Hardweld Camshaft prices include the core charge.

Your order will include the core charge. We will credit your charge card for the core charge as soon as we receive your good core.

Unsure if your cam core is good? See Requirements here.

HARDFACED ROCKERS

Made by grinding the stock (thin) surface from the rocker lobe, then adding thicker hardfacing and grinding to stock specifications.

Our hardfaced rockers are sold in 2 ways:

1. Set of OEM rockers, hardfaced, with core charge. Your order will include the core charge. We will credit your charge card for the core charge as soon as we receive your good core.

2. Work only. Send in a set of useable rockers and we will do the work and return them to you. Price listed is per rocker, quantity required is also listed.

CORE REFUND or EXCHANGE?

When purchasing most hardweld cams, you have two options:

1. Send us your core (with a copy of the Packing List), then we will ship your Powroll part.

-OR-

2. Order the part and pay the core charge When you receive our part, return your core to us, along with a copy of your invoice. We will credit your charge card as soon as your good core is received. See Sending Parts To Us for more info.