Some important key notes about this product and why it is superior to other manufacturers similar products are:
- Flywheel is made out of 7075-T6 aluminum, not cheap-o 6061-T6. This is of great importance due to the fact that the shoes are 7075-T6 as well. It is not necessarily that there is anything wrong with 6061, but when the shoes are harder than the flywheel, the flywheel wears instead of the shoes. This is a problem with the GPM setup because theie 6061-T6 flywheel ends up wearing out before the shoes do. Not good.
Built in ledge on the flywheel so the stock HPI clutch nut can be used instead of requiring a big, awkward and expensive nut sold separately on other systems.
Stainless steel shim replaces the brass shim used in kits such as the GPM setup.
Small diameter flywheel allows virtually any spur/clutchbell gearing option available.
All parts are available separately so when one component wears, the worn component alone can be purchased.
Absolutely no shimming before the collet is required, the flywheel in this kit is made specifically for the HPI Savage.
Each piece has been precision made with the Savage in mind. When using with any stock Savage engine, no further shimming should be required.
Made in the U.S.A.
The installation is pretty straight forward and probably for most does not require any instructions but here are photos from the install I did on my engine with the clutch set donated to me for review by eNVy Racing.
Please note that as with any clutch install, it is good to have a shim kit on hand just in case. As I said before, with the stock engine from any Savage, no further shimming should be required. This kit has been precision machined to be an EXACT fit on any Savage engine and can be shimmed to work perfectly in a Savage with any other engine on the market.
Now, on to the instructions:
1 ) This photo is of the crankshaft with nothing installed.
2 ) First, install the collet included with the flywheel
3 ) Next, place the flywheel over the collet:
4 ) and install the stock HPI clutch nut.
5 ) Then install the springs onto the shoes. The kit includes three springs, I suggest starting off with 2 springs only. If you desire higher revving capabilities before the clutch engages, install the third (optional) spring. After the springs are installed, place the shoes into the flywheel.
6 ) Place the included stainless steel shim onto the crankshaft after the clutch shoes. Have the beveled edge facing outward. This beveled edge provides support for the inner race of the bearing and this keeps the shoes from sliding in and out and in doing so, keeps the springs seated in place inside the shoes.
7 ) Install the inner clutchbell bearing, clutchbell and outer clutchbell bearing.
8 ) Install the stock HPI brass bushing (HPI86121) onto the crankshaft, install your set screw and you're done.
There should be little to no back and forth play in the clutchbell and the clutchbell should spin freely with no effort. When you set the clutchbell spinning, it should continue to spin for several seconds afterwards.
These installation instructions are for the stock HPI .21BB, S-25 and 4.6 engines with HPI clutchbells only. These instructions can be used as a guide on other engines, clutchbells or combinations thereof as well but every engine may require different shimming. Have an Ofna clutch bell shim OFN10099) kit handy just in case.
Links to the flywheel and complete kit are below. For those who have the GPM kit, all that is required is the flywheel considering your shoes and springs are still in good condition.
Complete kit - http://store.savagess.com/product_info.php?products_id=878
Flywheel, steel shim and collet only - http://store.savagess.com/product_info.php?products_id=879