Thinking of buying a 7 mill-need advice

[kjh]

I am considering upgrading my banshee by buying a trimmed out 7 mill 420 stroker and exchanging motors and other parts. I have two concerns, one is I am not familiar with the 7 mill. Mostly hear of 4 mills, pros and cons? Second, I will be exchanging motors from a J arm frame to an A frame any hang ups here? Very familiar with the basics of whats needed to upgrade to a 7 mill. carbs swing arm etc. What I want to know is what are the characteristics of a 7 mill and why do most seem to do 4mill? Currently I run a stock motor with porting, cool head and all the bolt ons. +4 swing arm(moving to 6), T5 pipes(moving to in frame CPI's) Thanks for reading.

[STINKYDELUXE]

Unless you are getting a really good deal on a 7mil i would just go with a 10 mil.

[kodie]

I am considering upgrading my banshee by buying a trimmed out 7 mill 420 stroker and exchanging motors and other parts. I have two concerns, one is I am not familiar with the 7 mill. Mostly hear of 4 mills, pros and cons? Second, I will be exchanging motors from a J arm frame to an A frame any hang ups here? Very familiar with the basics of whats needed to upgrade to a 7 mill. carbs swing arm etc. What I want to know is what are the characteristics of a 7 mill and why do most seem to do 4mill? Currently I run a stock motor with porting, cool head and all the bolt ons. +4 swing arm(moving to 6), T5 pipes(moving to in frame CPI's) Thanks for reading.

 

 

People do 4 mils over 7's because you don't need to modify your cases for 4 mils. 7 mils and over you need to have your cases trenched for the crank to fit. Doesn't matter what arms you use j or a's. Are you buying a motor already put together? Or are you doing the 7 mil modification. If you are doing it your self might as well go 10 mil pretty much the same cost and both cranks require case trenching.

[kjh]

People do 4 mils over 7's because you don't need to modify your cases for 4 mils. 7 mils and over you need to have your cases trenched for the crank to fit. Doesn't matter what arms you use j or a's. Are you buying a motor already put together? Or are you doing the 7 mil modification. If you are doing it your self might as well go 10 mil pretty much the same cost and both cranks require case trenching.

 

Thanks for the info, I am buying one already done and its a 7 mill. It has all the upgrade parts I need. Motor, CPI pipes, full bore plastics, +6 swing arm. I figure this will be a lot cheaper than buying all the parts new. I can sell the bike with my old parts for the same or maybe a little less.