Motorwork options??? - Kawasaki KFX450 Forum

conrad426 · 02-17-2009, 07:38 PM

Can someone give me the pros and cons of a stock stroke and higher compression piston compared to using a +2mm stroke and either a stock compression or slightly higher piston. Did some talking with Hot Rod and thinking about their new stroker setup.

mx333 · 02-18-2009, 12:00 PM

QUOTE (Conrad @ Feb 17 2009, 09:39 PM)

Quote:

Can someone give me the pros and cons of a stock stroke and higher compression piston compared to using a +2mm stroke and either a stock compression or slightly higher piston. Did some talking with Hot Rod and thinking about their new stroker setup.

I like the way my stock bore motor runs. I know these is more power there but i don't need it for the type of racing i am doing i need it to last a 2 hour race. I would call like rage,dasa,racers edge az they are all good shops and will get you the power you are wanting.

#3'skfx · 02-18-2009, 02:27 PM

if u raise the comp above 13:1 from what ive heard ur playing with fire unless u change the crank every couple rides . then the race cranks only last about 10hrs . hope this helps u .

mx333 · 02-18-2009, 05:41 PM

I have way more than 10 hours on my machine and my friends bikes with the same pistons both of them have over 100 hours with no problems,

#3'skfx · 02-18-2009, 10:11 PM

i caint belive ur friends have over 100hrs on a high comp pistion yall are very lucky . check the thread on blown motor . thats what happened n his case . ive talked with one of kawis team mechanics and he said they had to tear them down after every race and they were useing the aftermarket cranks he said the stock ones were lucky to make it through a race .

mx333 · 02-19-2009, 12:07 PM

QUOTE (#3'skfx @ Feb 19 2009, 12:12 AM)

Quote:

i caint belive ur friends have over 100hrs on a high comp pistion yall are very lucky . check the thread on blown motor . thats what happened n his case . ive talked with one of kawis team mechanics and he said they had to tear them down after every race and they were useing the aftermarket cranks he said the stock ones were lucky to make it through a race .

Well believe it. Me and another friend both have cp 13.5:1 one's and he says he has 125 hours on his and my other friend has a dasa 14.5:1 with 50 hrs and they are still running strong.

#3'skfx · 02-19-2009, 01:36 PM

all of yall are running stock cranks ?

mx333 · 02-19-2009, 03:12 PM

QUOTE (#3'skfx @ Feb 19 2009, 02:37 PM)

Quote:

all of yall are running stock cranks ?

Stock cranks. The one bike was bought from lonestar it was in ATV sport last year and has a complete dasa top end and it is still running great with a good ammount of hours on it.

#3'skfx · 02-19-2009, 04:46 PM

cool yall are the only three ive heard of thats had that good with them .

mx333 · 02-19-2009, 07:38 PM

I am sure that there are more of them out there you just hear the bad stories.

02-18-2009, 05:41 PM	#4 (permalink)
mx333 Member Join Date: Nov 2008 Posts: 40	I have way more than 10 hours on my machine and my friends bikes with the same pistons both of them have over 100 hours with no problems, __________________ 2008 Kfx 450 Roll long travel with Fox Floats Roll +2 stem with Fasst bars Lonestar Axle Hiper Whels With quadcross mx tires& douglous and maxxis for worcs Roll pegs,roll nerfs,roll heel guards Yoshi Pipe Fuel intake Dobeck programer Bored Tb LMR Porting Hot cams 13.5:1 cp piston Richochet skid plates More to come

02-19-2009, 07:38 PM	#10 (permalink)
mx333 Member Join Date: Nov 2008 Posts: 40	I am sure that there are more of them out there you just hear the bad stories. __________________ 2008 Kfx 450 Roll long travel with Fox Floats Roll +2 stem with Fasst bars Lonestar Axle Hiper Whels With quadcross mx tires& douglous and maxxis for worcs Roll pegs,roll nerfs,roll heel guards Yoshi Pipe Fuel intake Dobeck programer Bored Tb LMR Porting Hot cams 13.5:1 cp piston Richochet skid plates More to come

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02-17-2009, 07:38 PM	#1 (permalink)
conrad426 Junior Member Join Date: Jul 2008 Posts: 25	Can someone give me the pros and cons of a stock stroke and higher compression piston compared to using a +2mm stroke and either a stock compression or slightly higher piston. Did some talking with Hot Rod and thinking about their new stroker setup.

02-18-2009, 02:27 PM	#3 (permalink)
#3'skfx Senior Member Join Date: Oct 2008 Location: Alabama Posts: 112	if u raise the comp above 13:1 from what ive heard ur playing with fire unless u change the crank every couple rides . then the race cranks only last about 10hrs . hope this helps u .

02-18-2009, 10:11 PM	#5 (permalink)
#3'skfx Senior Member Join Date: Oct 2008 Location: Alabama Posts: 112	i caint belive ur friends have over 100hrs on a high comp pistion yall are very lucky . check the thread on blown motor . thats what happened n his case . ive talked with one of kawis team mechanics and he said they had to tear them down after every race and they were useing the aftermarket cranks he said the stock ones were lucky to make it through a race .

02-19-2009, 01:36 PM	#7 (permalink)
#3'skfx Senior Member Join Date: Oct 2008 Location: Alabama Posts: 112	all of yall are running stock cranks ?

02-19-2009, 04:46 PM	#9 (permalink)
#3'skfx Senior Member Join Date: Oct 2008 Location: Alabama Posts: 112	cool yall are the only three ive heard of thats had that good with them .

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