Suzuki Quadracer HQ
LT500R Quadracer => LT500R - Engine => Topic started by: Rogue1970 on January 20, 2016, 03:34:02 pm
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Well, I **** my reinforced cylinder and broke my case a few weeks ago. You can see pictures in my build thread.
My question is, was/is part of the magical HRD formula to lightening the crankshaft with drilled holes? During tear down this last weekend, I noticed that my crank has 4 1" holes drilled around the big end of the crank. No pictures right now, but I should get some when I split the case.
Can anybody confirm this procedure? Seems that if you lighten the crankshaft assembly, wouldn't there also be a procedure to lighten the countershaft balancer to keep the engines rotating mass 'smooth'?
If the holes do not hurt the balance of the crank I would not worry about it. The bottom line is does it vibrate more than a stock crank? I have not seen where the holes are located as to whether it may affect the strength of the crank. I personally believe these types of crank lighting modifications fall into the same category as machining the OD of the ignition flywheel to lighten it..............snake oil.
I also have the equipment to perform these types of mods but I try to keep them busy performing modifications that make noticeable gains.
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Mike does not do bottom ends.
He sends them to Bob in Oregon. aka RxHP
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1" holes are not an HRD mod, sounds like a Stiener mod.. HRD is just trued/welded OEM in most cases.
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Yes Mike built my bike back in 2010. I've ran it quite hard for many years, so I in no way blame Mike for anything. Mike did right by me for the time involved, effort and communication when he had my engine. I was just curious if the holes drilled in the crank are a HRD 'Rx'. I should soon know if a stock crank fully built Quadzilla runs smoother then mine over 4k or it it feels the same.
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Didn't Mike Steiner build your motor?
He usually does pretty good work from what I've heard.
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i noticed my 250 has big holes like that in the crank but not my 500
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Well, I **** my reinforced cylinder and broke my case a few weeks ago. You can see pictures in my build thread.
My question is, was/is part of the magical HRD formula to lightening the crankshaft with drilled holes? During tear down this last weekend, I noticed that my crank has 4 1" holes drilled around the big end of the crank. No pictures right now, but I should get some when I split the case.
Can anybody confirm this procedure? Seems that if you lighten the crankshaft assembly, wouldn't there also be a procedure to lighten the countershaft balancer to keep the engines rotating mass 'smooth'?