Ironhead evo cases for ironhead?

[Hopper]

Originally Posted by billeuze

The base cylindre base bolt spacing on the evos is further apart than on ironheads. Could be good though for fitting custom big bore cylinders on an evo botem with iron heads

Or nothing a tig welder would not fix and redrill stud holes for IH cylinders.

[xrayrider]

Just noticed an early 1100 Evolution Sportster for sale locally. The primary cover and cases looks like they were off an Ironhead. Are the 1100 Sportster cases compatable with an Ironhead engine? Maybe that is a possible solution?

[nikki]

Originally Posted by xrayrider

Does this mean that as the supply of used uncracked cases dries up, someone will step in and supply aftermarket cases?

S&S did at one time cast Iron head cases , Now they cast evo cases and you must mix parts to get then to work . Nikki

[DonW]

One thing I've learned in many years of fiddling about with non-current motorcycles: Don't ever assume somebody will never re-pop something. I'm also a Norton Commando fan, and after many years, they are now doing both steel gas tanks, and cylinder heads. The heads are expensive, but beautiful. Indian tanks, Vincent cases, just lots of cool stuff being re-made today.

[paraord]

what kind of idiot is bustin up cases??

[Hopper]

S&S cases for Evo Sporties cost $2600
http://www.sscycle.com/product/Sport...ls-p24881.html

You could buy two or three or four Ironhead basket cases or a good runner for that much and use the cases from them, is probably why they dont make cases for Ironheads.

[barefoot]

Originally Posted by DonW

One thing I've learned in many years of fiddling about with non-current motorcycles: Don't ever assume somebody will never re-pop something.

But when they do, it will be a sign that the iron XL is dead as a fun bike. When I bought my Vincent it was from a guy at Mother's Motors who stuck it together out of parts, threw a pair of old saddlebags over the passenger seat and drove it cross-country, repairing it at every Brit bike shop on the way. It was fun. Now that bike would cost $70,000 and only come out of its $35,000 trailer to touch the brilliant green grass of Pebble Beach once or twice a year. This is not fun.

Early Sportsters will get there some day. I'm only surprised that they haven't already. Maybe that's because yuppies have no effing taste whatseover. Enjoy this while it lasts.

[canuck]

It is still a good concept... that is what makes wrenching interesting is the ability to take concept to reality. It is not uncommon for the concept to be inspiring in nature yet the end of endless complications on the road to completion. I would be interested to see a blueprint of how the two compare dimensionally. My main concern would be the cams and the valve train geometry as I don't know what changed with the cam arrangement with the evos.

[T. Clark]

Getting the barrels to fit should be fairly straight forward. I've read evo deck heights are taller, a machine shop could soon fix that along with repositioning base stud locations. A sleeve might be needed to locate the iron barrels into the cases (I think evo barrels have a larger spigot diameter). But what about the oil galleries? Don't evos feed the top end through the barrels? Could those galleries be blocked off, and external oil lines to the top end fitted? Then there is the crank, would you need to use an evo crank, maybe fitted with the longer ironhead rods?

S&S cases are expensive, but seems like you can still get STD cases for about $1600. At least they are brand new and stronger than stock. Or used 4 speed evo cases for next to nothing?

I'm about to put together a stroker, got T&O to do the crank, bore and modify the barrels for me, got all andrews tranny to go in. If my budget will stretch far enough I'll get the heads ported and twin plugged as well. That's a lot of money to put in 30 year old crankcases. I think I'll get my cases repaired for now, but it would be nice to know there is an alternative to using tired cases.

Food for thought. If you used S&S cases you could run a Baker six speed in it, cases are bored to accept 3 5/8 barrels. Throw in a stroker crank and you've got a 93" motor. Apart from the heads it could be all new and completely bulletproof. Would be a nice addition to the S&S Flathead series along with 93" knucks, pans and shovels.