2008 model Ultra Big Bore Stage 2
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Novice
Joined: Mar 2009
Posts: 18
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From: UK
2008 model Ultra Big Bore Stage 2
Some Advice please.
Bike has done 20,000 and I am about to fit the SE Big Bore Stage 2 kit.
Should I go with SE electric or manual compression releases and do I need 2; one for each cylinder?
Should I replace any other parts such as cam bearings, lifters etc?
Appreciate your responses thanks.
Bike has done 20,000 and I am about to fit the SE Big Bore Stage 2 kit.
Should I go with SE electric or manual compression releases and do I need 2; one for each cylinder?
Should I replace any other parts such as cam bearings, lifters etc?
Appreciate your responses thanks.
Elite HDF Member
Joined: Jul 2007
Posts: 4,749
Likes: 16
From: sand mountain Alabama
You did not say whether you are considering a 103 0r 110 ci
Here is some information. Lot to read but hopefully you will find your answer.
https://www.hdforums.com/forum/touri...e-upgrade.html
dd
Here is some information. Lot to read but hopefully you will find your answer.
https://www.hdforums.com/forum/touri...e-upgrade.html
dd
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,559
Likes: 3,955
From: Vermont
You technically only need compression releases when you have compression at 10 or higher. If you are close to 10, say like 9.8:1 it wouldn't hurt to use them as it helps save your starter. If you are down around 9.5 or so I wouldn't bother. Yes you would need one for each cylinder. Choice is yours if you want manual or not. If you're replacing cams, I would definitely replace the inner bearings with Torrington B168's. At 20k your lifters should be fine. There is a school of thought about lifters and cam lobes wearing in conjuction with each other and I know folks that do put new lifters in anytime a new cam goes in. If you were closer to 40k I'd say swap the lifters, but you should be ok.
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,559
Likes: 3,955
From: Vermont
cold crank compression is a factor as well. So is the atmosphere as to where someone lives to an extent (i.e. heat) I was stating for a general rule as compression at 10. You brought up a good point though. If you have ccp at 190-195 you could probably get away without the releases, but consider hot restarts and whatnot. Cheaper insurance to install them up front than to replace broken chit later on.
Last edited by dawg; Nov 28, 2009 at 06:28 PM.
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