In 1991, Rotax began production of a double overhead cam version of the 604 engine, including liquid cooling of the cylinder head. Ron Wood immediately began work on high performance parts and modified both the dirt track and road race frames to accept the engine. Bigger cams, shim-under valve lifter buckets and titanium valves were just a few of the parts that went into the new project. The twin cam engine also made more torque than its predecessor, meaning more stress on the clutch.
With the new parts and higher stress on the engines, more wear appeared on the cams, lifters and other parts. Up to that time, premium petroleum racing oils had been used in the Rotax engines. Ron consulted his good friend C.R. Axtell about the problem and “Ax” suggested that he try Red Line 40wt synthetic racing oil.
With the new oil, the cam and bucket wear was next to nothing. All the engine parts were in excellent condition after several races, whether in the dirt tracker or road racer.
In the past, synthetic oils had been avoided due to clutch slippage problems. Red Line had a history of working with some of the top motorcycle racers in northern California, and had experience with wet clutches. The extra torque had been a problem with the standard organic plate clutch, and there was obvious wear on the sintered bronze clutch at the standard driven plates. Switching to Red Line improved clutch life and reduced wear and slippage for both clutches.
Red Line 40WT Race Oil - Elliott Power Sports
elliottpowersports.com
Red line is the oil of choice in formula Ford. & a good deal of formula Atlantic. Cars too
Self-contained groover has built-in temperature controls eliminating the additional cord and separate control box common with other groovers. Don't let the small package fool you; this groover has the ability to cut small intricate grooves yet still handle removing material up to a 1/2". Tapered, razor sharp blade grooves fast and easy.
To operate, insert a single blade into groover, set blade height with a tire depth gauge and set the power level. Place the cutting edge against the tire surface and obtain instant heat by simply pulling back on the trigger. Groover features a Hi/Low toggle switch and a temperature control dial in the handle for setting desired heat level. "All-In-One" groover requires "All-In-One" blades; do not use standard groover blades with this groover.
Groover: $359.99
Blades 12-Pk: $14.99
Please contact us if you are interested.
Tire Groover - Elliott Power Sports
elliottpowersports.com
More affordable pistol grip groover also available. Backordered items ship direct from supplier.
The instant on tire groover is the best... Well worth the price.. And you don't have to choke on burnt rubber... Just push it across the tire... And peel out the groove it leaves a nice sharp edge on the tire...
Now Stocking 15t Timing Pulley & Flywheel Pullers
Made In The USA!
15t Timing Pulley Puller
elliottpowersports.com/product/tools-gasket-sets/puller-timing-pulley-15t
Flywheel Puller
elliottpowersports.com/product/tools-gasket-sets/puller-magnetoflywheel
The long-awaited CP-Carrillo catalog!
Contact us for all your CP-Carrillo needs, dealers welcome.
cp-carrillo.com
Aftermarket Rotax CDi boxes back in stock.
Amplifier Box (CDi) - Elliott Power Sports
elliottpowersports.com
Is there much adjustment on the ignition curve w this ?? Will assume it works equally well w a 640 ?
Duane Worden......a spare wouldn't hurt
Revisiting ceramic hybrid bearings.
I've been doing more research, found a reputable distributor at a competitive price. You see manufacturers claiming 10x bearing life, lets be realistic and say 3-4 times longer and 5% horsepower gain.
Quality name brand races and American made, aerospace grade silicon nitride balls. (None of the Chinese knockoffs you see on internet wholesalers)
Using the 604FT as an example
All 8 bottom end bearings, camshaft, and belt tensioner bearings.
Standard Bearings - ~$230
Ceramic Hybrid - ~$780
At almost 340% the price, who would consider hybrid ceramics?
3-4 times the life of standard carbon steel bearing?
Me
Me too
Mike Oneil says spend money on something else.
If it were a true 5% Horsepower gain that would be money well spent.
I would definitely be up for a set if I get 3 times the wear out of em. As you say, HP hains are a bonus.
As an engineer no. Ceramics have amazing wear and frictional properties, but where a steel bearing will eventually increase in free play, a ceramic will self destruct after any shock forces.
If your main bearings incur enough shock that they "self destruct" then your probably looking at replacing cases, balancer, trans etc.
Use the best lubricant available. Lubrication Engineers 10-30 or 40.
Red Line 40wt Race oil
I love the "best oil" debate. It's never settled and never gets old.
(SOLD) C&J FRAMED 676 WOOD ROTAX
$6,500 - Flora, IL
C&J framed 676 wood rotax,fresh motor.Wood #60322 motor,#181 head,new 45mm hsr mikuni,new K&N filters w/skins,penske 8000 shock,R6 forks,A&A clamps,A&A rear quick change,brembo/grimeca rear,honda front brakes,sun rims,ferrea valves,kibblewhite springs,magura hydraulic clutch,new rotax clutch plates,triumph rh peg,Custom grab rail around rear fender,new rear fender,wood parts book and spare parts.Needs nothing but plates to go racing.No BS FAST. Can deliver to Springfield.
Ferodo brake pads back in stock.
FDB205 - Grimeca 1010
FDB207 - Brembo 32mm
FDB698 - Grimeca 1025
FDB2139 - Honda CRF
elliottpowersports.com
Larkin Wight is a fixture in the motorcycle industry, one of our clown princes. He has ridden and raced just about everything with two wheels.
He was recently injured in a motorcycle accident and needs our help. This Saturday, at the SCFTA races at Perris Raceway, we will be raising money to help offset some of his expenses.
Please share this with anyone you think might be interested.
He is at Arrowhead regional hospital in Colton on Pepper Street if anyone would like to go visit. He is in room 4209 under Edwin Wight (Larkin is his middle name).
mailchi.mp
Short shift levers back in stock, looking into some long ones as well.
Shift Lever - Elliott Power Sports
elliottpowersports.com