if it is possible to tell if an engine is an 88 or a 95 inch without taking it apart? Is there telltale things to look for or not? I have a 2005 RK and the dealer where I bought it has very little info on the bike except from when it was delivered.

 

That's a good question. If it's not marked,it would be hard. A run on a dyno would tell for sure,without taking it apart. 2 cents

 

It would be tough with out acually pulling a head off and measuring the bore!

I would challenge them and say prove it! show me the recipts, if not, then as far a im concerned its an 88!

 

Sorry Softy, but a dyno has absolutely no way of determining how many cubic inches there are in a given engine. There are only two ways that I know of to determine C.I. (1) Teardown and measure, or (2) Pump the cylinder with a pre-determined amount of fluid, (basedon known values for cylinder size and stroke). Thats basically it! Option #2 does not require engine teardown, just some math and some type of measuing device to hold a specified amount of fluid.

 

I understand your point,but a 95 " willshow a significant increase in HP and Tourqe,hardly possible to duplicate with a stock 88". The dyno measures hp and torque.I don't know much,but I know what a dyno does...

 

You may know what a Dyno does but you still won't be able to tell if it's a 88" or a 95".Just a plain 95" Big boreis not that significant of an increase in TQ or HP.When my Road King was still an 88" I put in a set of S&S 510G cams and I it would walk away from just a plain 95" with stock cams. Heck My 88" would run neck & neck with the 2003 SE 103" Road Kings all day long. Now that I did the 95" with High compression and head work my Road King will eat up a SE 110"

 

It needs to be torn down to be sure. The HP and TQ will let you know if its been beefed up, but I have seen some 88ci that are in the 100's on both HP and TQ.

 

This is what I thought, I just wanted to make sure I wasn't missing something. This bike runs like a scalded dog all the way through the powerband but the dealer says it is most probably stock with true duals and SE A/C. Intetrestingly enough it has the HD0800 AC(K and N)which is for the 1690cc bike but I have been told that sameAC can be used on a 1450 also. Oh well it was worth asking and I got some good discussion out of it anyway. THANKS!

 

When I bought my bike it was used... I wanted to have an extra set of keys made... My parts guy pulled up the VIN... he told me who the previous owner was, he also told me no additional work had been done to it "by a dealer"

You may be able to check if your bike has the upgrade this way if it was dealer installed. I don't know this for certain, but my parts guy showed me on the computer screen all the pertinent info regarding my bike... Could work for you if there is a 95" and it was dealer installed..

 

Engines are oiled out at the track all the time to determine dissplacement, not that tough to do and it can also tell you the actual compression ratio. Track officials have a handy device to test these with. They use it to find cheaters.