View Full Version : evo motor in ironhaed frame
15th January 2005, 18:30
I am wondering if anybody knows how easy or difficult it may be to swap an evo motor into an iron head frame?
15th January 2005, 18:33
why would you want to do that?
an evo frame is a far better frame
15th January 2005, 18:40
Because I spent 2 winters modifying the ironhead frame to an 8up and 8out chopper. Then rode it for 1 summer.
15th January 2005, 18:41
The Evo Sporty motors are taller by about 1-1/2" (Guestimate) and would require that you raise the backbone of the frame. Also the rear motor mounts and front motor mounts are different. You can modify just about anything, but it is a lot of work.
Surf the web and check out aftermarket frames. There are some nice hardtail frames out there and possibly one that mimics the old ironhead frame's swing arm/shock placement look. :smoke Hrdly
15th January 2005, 18:45
Just caught your second reply...If you've already raise the back bone, then you should have no problem with fitting the Evo motor in....just a matter of making up new motormounts for the front and modifying the rear one.
Lay the motor on its side on the ground, then take your frame a place it over the motor for an initial fit test. You'll be able to see what mods you need to make. :smoke Hrdly
15th January 2005, 18:45
and you want to put an updated motor in that frame , right
well since your 8up and out I would say space isn't a concern, so other than making the motor mounts it sould be a fairly straight forward swap that anyone with a welder and some fab skills sould be able to do
what happened to the iron motor ?
15th January 2005, 18:48
You could probably sell that frame for a couple hundred on E'bay...take that money and check out a Paughco Hardtail Frame for about another 6-7 bills...OR NOT :smoke Hrdly
15th January 2005, 19:01
:D That's my question....where's the Iron at, is it blown is it for sale is it worth F'n with, if it is...how nuch $$....but flathead has a good point, if the Iron frame is 8up you probably won't have clearence issues...there sure aint no reference manuals for it....you gotta try it to see if it fits...if it does~put it in....if it dont~some mods are comin yer way...then u ask yourself is it worth it.....many mooons ago some guy crammed a V-8 into a frame~now there's Boss Hoss....anythings possible with imagination, welder, some metal, time....commodities like that, build anydamnthing....Mike 74XLH :D
15th January 2005, 19:20
The motor is still there,but its hangin on buy a wing and a prayr.Where do I start? Well the top end needs to be rebuilt(oil fouling the plugs).A very nasty tick in front head(rockers).Mounting tab broken off front cyl.Bottom end ,who knows ? Rear motor mounts striped.And thats just what happened in one summer. Ibelieve it would cost more to repair than replace. Don't get me wrong Ilove the simplelicity of the ironhead,just dont believe its worth fixin. Can buy a wrecked evo sporty less money than it would take to rebuilb all thats wrong with the ironhead.I do have the welder and fab skills I'm just not that much of a wrench. Thanks for your input on the subject.
15th January 2005, 19:26
what year is it , I might be interested in a parts motor (if ya wanted to unload it)
of coarse after ya get it goin' with a new motor
I'm always looking for a parts motor
15th January 2005, 20:07
The motor doesn't sound bad to me.....
Rear mount can repaired or replaced.....
The noise from the Head could be a couple things...which would be addressed during the rebuilding of the Heads....could be something very simple to repair....
Oil fouled plugs could be the valve guides are worn....or your oil rings are shot....again standard rebuild stuff.
Bottom End on a stock Sporty motor rarely needs an actual rebuilding...They are actually very strong...and unless your modifying for H.P or have suffered a none failure of some type which has contaminated the oil...chances are you won't have to break apart the cases or replace the lower end bearings.
Once you get the Top End off you'll do the standard check of the side-play for bearing wear, check for squareness of the Rods....replace the piston-pin bushings and ream to a snug fit for the piston pins may be all you'll need to do there.
Point is, I wouldn't assume that its going to require a lot of money to get running again. Even at $1000.00 for motor work, your way ahead of the game because the bike is complete now. Ironheads are pretty simple motors and you could probably do 75% of the rebuild yourself.......and good running Ironhead motorcycles are pulling 4500.00 and up on E'bay right now!
I wish I had another Ironhead project...... :smoke Hrdly
15th January 2005, 20:14
stop it hrdly, your gonna queer the deal
no I agree with hrdly , price check a rebuild first , I payed less than a grand to get my whole bottom end rebuilt and that included welding up a broken trannie and three or four gears , look for a local indy who has a good rep , their cheaper than the o-fish-all dealers
you'll wish you still had the fehead after a few miles with an evo
15th January 2005, 20:45
QUEER THE DEAL??..........NOW WAIT A MINUTE!! :mirror
15th January 2005, 21:54
18th January 2005, 23:20
now there's an expression i haven't heard since I lived in CAPE TWISCO myself!
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