Removing epoxy ramp on crankshaft...
#1
Removing epoxy ramp on crankshaft...
What effect would that bring? I found out the hard way that using certain after-run oils (that contain petroleum) damage the epoxy causing it to deteriorate. So now I am forced to remove the epoxy ramp.
FYI: epoxy ramp is that red or clear putty you will see below the carburetor/on the crank if it is lightened. It's on certain engines like the JP raing, Max Power, and Werks Teamline.
FYI: epoxy ramp is that red or clear putty you will see below the carburetor/on the crank if it is lightened. It's on certain engines like the JP raing, Max Power, and Werks Teamline.
#2
Tech Elite
iTrader: (17)
The filler is supposed to help aid the air flow throw the crank opening, filling the void when the crank is drilled out for lightening. You can have the crank repaired if needed. Check with Maxy at Maxy's Fuels. I had him repair one of my Novarossi cranks. LMK if you need to reach him. Reid RC is another choice also.
#3
Most good builders can re fill it for you. If you don't feel like being without the motor for so long you can go ahead and run it as is. I doubt you will notice much of a difference.
#4
Tech Addict
Ive noticed a couple types of crank filler epoxies are being used. Some are soft rubbery silicon feeling, and others are hard. Anyone know what, or where you can get the filler itself? The stuff that OS uses in the Speed motors seems to work the best, anyone know what that is?
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#5
You can do it yourself very easily.... go buy some Threebond 1211 ...tilt the crank back and drizzles the Threebond into the void...it will naturally flow itself out into a smooth surface............. Funny thing is you can likely also use the Racers edge sealant.... which seems identical to Threebond but dyed red .... Make sure you clean the surfaces well then allow the sealant to cure for 48 hours..........its much easier then it sounds ! good luck !
#6
I spoke to Jim Hottinger @ Fusion Motorsports and he said that the oil from the fuel will seep into the crank and will make it hard for the epoxy to fill and seat into the crank. I'm going to give it a shot and run without the epoxy ramp and see how it goes from there.
#7
I spoke to Jim Hottinger @ Fusion Motorsports and he said that the oil from the fuel will seep into the crank and will make it hard for the epoxy to fill and seat into the crank. I'm going to give it a shot and run without the epoxy ramp and see how it goes from there.
#9
The sole reason for the epoxy ramp is to increase crank pressure and make more power. You will likely get better mileage with the epoxy out because of reduced crank case pressure. The drop in power will be negligible, and you probably won't notice it, unless you are Jared Tebo.
#10
Tech Master
iTrader: (4)
What effect would that bring? I found out the hard way that using certain after-run oils (that contain petroleum) damage the epoxy causing it to deteriorate. So now I am forced to remove the epoxy ramp.
FYI: epoxy ramp is that red or clear putty you will see below the carburetor/on the crank if it is lightened. It's on certain engines like the JP raing, Max Power, and Werks Teamline.
FYI: epoxy ramp is that red or clear putty you will see below the carburetor/on the crank if it is lightened. It's on certain engines like the JP raing, Max Power, and Werks Teamline.
#12
Tech Master
iTrader: (66)
Another thing you can do if you feel you have to have the filler is to give it it something to bite into. I either take my dremel and cut a few holes and groves into the crank or I drill, tap and put a screw in so the epoxy can fill in around the head and that will hold it in place. But I agree with the people who mentioned there will not be much of a difference in performance. The epoxy certainly doesn't hurt the function of the engine but running a motor without it will certainly not hurt performance either.
#13
Tech Apprentice
If a piece or chunk of the epoxy comes loose, is it soft enough to just shut the engine off.. or will it cause major damage?
Also where can you get this ThreeBond 1211 stuff, and what was its normal use designed for?
Also where can you get this ThreeBond 1211 stuff, and what was its normal use designed for?
#14
Tech Master
iTrader: (4)
if some got hung up in a port the piston would sheer right through it, the worst that could happen is get in the bearings then you need at least a new rear, the 1211 is avalable through performance two stroke shopes, we have one here locally i used to get it from there, it's a gasket maker.
#15
Tech Master
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Join Date: Jul 2007
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Yup Threebond is what we use. In the dozens of motors we've done, not a single problem.