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Author Topic: YFZ450 Crank - LT500R Mod  (Read 932 times)

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YFZ450 Crank - LT500R Mod
« on: December 29, 2012, 02:30:53 pm »
It probably wont work.  :))



YFZ450 (Early 04-05) Left
LT500R Right

Shows how over-square and short stroke the high performance 4 stroke 450's are. Also is an indication on how much the LT500R is a beast. 
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Re: YFZ450 Crank - LT500R Mod
« Reply #1 on: December 29, 2012, 04:39:30 pm »
Not really the stroke its more like the length of the rod being how short the cylinder is on the yfz.
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JR Motorsports
Halls Precision Racing

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Re: YFZ450 Crank - LT500R Mod
« Reply #2 on: December 29, 2012, 04:47:51 pm »
If only the 500 had a smaller stroke would be able to rev way higher.
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Re: YFZ450 Crank - LT500R Mod
« Reply #3 on: December 29, 2012, 09:14:13 pm »
I think advancements in metalurgy should allow engineers to re-design the crankshaft & connecting rod using lighter stronger materials to let the big 500 rev up higher than 9000 RPM.
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Brian
1988 Suzuki LT-250R (The HPR test mule)
1987 Suzuki LT-500R
1990 Suzuki LT-500R
1982 Honda ATC-185S
1982 Honda ATC-250R

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Re: YFZ450 Crank - LT500R Mod
« Reply #4 on: December 31, 2012, 12:51:48 am »
Quote from: El Diablo on December 29, 2012, 09:14:13 pm
I think advancements in metalurgy should allow engineers to re-design the crankshaft & connecting rod using lighter stronger materials to let the big 500 rev up higher than 9000 RPM.
stock raptor 700 revs to 9000 as well and is a larger thumper. so i agree that zilla can be made to rev higher.
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1985 Yamaha Tri Z 250
2006 Suzuki LTR 450
2011 Suzuki Hayabusa

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Re: YFZ450 Crank - LT500R Mod
« Reply #5 on: December 31, 2012, 10:03:51 am »
Anyone have any input about using the CR500 rod to fix(help) the bad rod angle of the Lt500? 
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Re: YFZ450 Crank - LT500R Mod
« Reply #6 on: December 31, 2012, 10:52:10 am »
Wasn't the kx500 rod being looked into?
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87 HPR LT500
04 Roll LOBO II TRX250R
06 LTR450
87 LT500
85 & 86 LT250
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07 & 09 Husqvarna TE450
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Re: YFZ450 Crank - LT500R Mod
« Reply #7 on: January 08, 2013, 04:03:29 pm »
yup but there are still questions on the kx 500 rod
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1985 Yamaha Tri Z 250
2006 Suzuki LTR 450
2011 Suzuki Hayabusa

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Re: YFZ450 Crank - LT500R Mod
« Reply #8 on: March 15, 2013, 07:47:29 pm »
Hey guys. The CR500R rod is 144mm long, and the KX500 rod is 145mm long. Not really worth doing. I got some contacts in case anyone wants to spend some major cheese and have some made...
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Re: YFZ450 Crank - LT500R Mod
« Reply #9 on: March 16, 2013, 12:08:13 am »
I can have Rods made to any size for approx $220 each by the same company that supplies ford Motorsport here in the Uk
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Re: YFZ450 Crank - LT500R Mod
« Reply #10 on: March 16, 2013, 07:26:43 am »
Ooh. Useful! I'll remember that!
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