motor build : V-Twin Forum: Harley Davidson Forums

wanna ride · 08-08-2009, 04:27 PM

I'm looking to do a total rebuild on my new to me 89 FLHTP as soon as the weather starts turning cold which won't be all that long up here. The bike has 138,000 km on the motor. I did a compression test on stone cold motor and got 115 psi. The bike actually runs quite well other than a bit of oil leaking from cam cover area. So I guess I should get to the question, seeing as I'm planning to redo the entire motor starting with the valves guides and working down to bottom end what can I purchase to start filling the shelves in preparedness of the build without opening up the motor other than the obvious motor gasket kit? I have no idea what size pistons are in the bike seeing as I just got it 700 miles ago. I'm not looking to build a ratical motor just a hi milage good 2 up riding bike.

baggersport · 08-08-2009, 08:28 PM

Can't beat the price of the Factory rebuild program for the Evos.

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wanna ride · 08-09-2009, 01:42 AM

Quote:

Originally Posted by baggersport

Can't beat the price of the Factory rebuild program for the Evos.
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Yes I have thought of this direction as well, in fact I've been trying to get together a list of prices for parts and shop machining prices to compare with.

econnor · 08-09-2009, 07:15 AM

You will need new lifters for sure, might want to think about a cam upgrade, new hardware maybe, rocker arm shafts and bushings.

baggersport · 08-09-2009, 09:53 AM

Quote:

Originally Posted by wanna ride

Yes I have thought of this direction as well, in fact I've been trying to get together a list of prices for parts and shop machining prices to compare with.

Last one I had rebuilt using the factory program was a bit over $2k. There's no way I could rebuild it bottom to top....and use new components like they did....for that price. The only thing that we noticed used and re-built when we got it back was the flywheels and the .010" os cylinders. Everything else was new....heads, cases, lifter blocks, etc... even the bored cylinders had fresh machining on the fins and new powdercoat.

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Beemervet · 08-09-2009, 10:46 AM

Quote:

Originally Posted by wanna ride

I'm looking to do a total rebuild on my new to me 89 FLHTP as soon as the weather starts turning cold which won't be all that long up here. The bike has 138,000 km on the motor. I did a compression test on stone cold motor and got 115 psi. The bike actually runs quite well other than a bit of oil leaking from cam cover area.

So if it ain't broke, why are you fixing it?

gsxrboy96 · 08-09-2009, 12:41 PM

Quote:

Originally Posted by Beemervet

So if it ain't broke, why are you fixing it?

agreed, that motor is barley broke in, do a top end kit, send your heads off to hillside for a freshing as well as the cylinders, put a lil camshaft such as ev27 or evl3020, and it will feel like a whole new bike.

wanna ride · 08-09-2009, 01:25 PM

Quote:

Originally Posted by Beemervet

So if it ain't broke, why are you fixing it?

I just figured with the amount of milage it may be a bit tired.
When I did the compression test it was cold and I neglected to open the throttle and got 115 psi even on both jugs, today I will check them while hot and throttle open.

wanna ride · 08-09-2009, 01:25 PM

Quote:

Originally Posted by econnor

You will need new lifters for sure, might want to think about a cam upgrade, new hardware maybe, rocker arm shafts and bushings.

Already on the list.

wanna ride · 08-09-2009, 01:27 PM

Quote:

Originally Posted by gsxrboy96

agreed, that motor is barley broke in, do a top end kit, send your heads off to hillside for a freshing as well as the cylinders, put a lil camshaft such as ev27 or evl3020, and it will feel like a whole new bike.

I've heard that the bottom ends are good for three top end jobs although I would think a fresh top end would be hard on a tired bottom end.

wanna ride · 08-09-2009, 09:59 PM

Got around to doing the compression test with motor hot and throttle wide open which I beleive is the correct way of doing it, I got 140 psi on both which is better than originally thought. So I got a question, if compression is descent ( at least I think it is ), does good compression and a none smoking exhaust indicate that the heads and cylinders are good and no motor job is needed?
The bike seems to run ok although it doesn't compare in torque to my 02 Dyna WG when were 2 up riding. And if motor doesn't need anything what can I do to improve torque on than the suggested cam. Aren't these copbikes suppose to have a better than stock cam already?

gsxrboy96 · 08-09-2009, 11:22 PM

Quote:

Originally Posted by wanna ride

Got around to doing the compression test with motor hot and throttle wide open which I beleive is the correct way of doing it, I got 140 psi on both which is better than originally thought. So I got a question, if compression is descent ( at least I think it is ), does good compression and a none smoking exhaust indicate that the heads and cylinders are good and no motor job is needed?
The bike seems to run ok although it doesn't compare in torque to my 02 Dyna WG when were 2 up riding. And if motor doesn't need anything what can I do to improve torque on than the suggested cam. Aren't these copbikes suppose to have a better than stock cam already?

with just a ev27, the bike will feel like a whole new bike......the way harley should have rolled them outta the factory, and if you have a rep shop such as hillside do a valve job with a lil clean up port work and deck the heads, that old evo will destroy your dyna. i wouldnt worry too much about the bottom end, you can usually mileage the snot outta those, and if your real concerned with it, id take the jugs oversize and put a lil compression in the bike, just my two cents.

wanna ride · 08-11-2009, 12:21 AM

Ok so I decided I'm going to start with
HQ-0024 CAM, Rumble Stick Evo
HQ-2500 JETS, CV carb tuner kit
HQ-6000 IGNITION, Evo programmable

This winter I will send the jugs and heads to Doug at HQ. This should make a differnce.

wanna ride · 08-12-2009, 02:20 AM

gsxrboy96 do you have a decker that you put the cam into? I'm wandering if there is going to be a small differnce or a large noticeable differnce with the cam and ignition. I can bet there is goign to be more noticeable differnce once the heads and jugs are done.

gsxrboy96 · 08-12-2009, 08:50 AM

Quote:

Originally Posted by wanna ride

gsxrboy96 do you have a decker that you put the cam into? I'm wandering if there is going to be a small differnce or a large noticeable differnce with the cam and ignition. I can bet there is goign to be more noticeable differnce once the heads and jugs are done.

Lynn, im not sure what you mean by decker? But when i first bought my dresser, it was stock, so i just threw a ev27 at it, and it was a big difference, Then i bought a set of cycle rama heads and jugs that were .020 over with wiseco 10.1 pistons, The bike ran better than before, but not what i expected, but after going to a woods w6, the bike ran it ass off, but the noise was a little more than i cared for, so i put a vthunder camshaft in the bike, and am happy, I will tell you this, my bagger will outrun stock 88 inch dynas all day,,,and a buddy of mine has a 95 inch kit in a night train, and we are dead even, so you will be quite happy if you do all those modifications, as far as ignition, besides elimininating the stock 5200 rev limiter, you will see no difference in power with ignition.