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  #1  
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Default What cylinders

Hi again you guys have been a fountain of knowledge so far. Can any one tell me what year jugs/ cylinder are suitable to fit on my 2004 883c. Thanks
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Any Evo cylinder will fit but 2004 and later has big fin.
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thanks. So do the cylinders have to be 2004 up for mine because of the fins or will any fit as long as its for an evo engine. Can 883 cylinders be bored out to 1200 or are they totally different. Also will standard 1200 jugs go straight on or do they have to be a specific conversion type. Basically i have a friend who has some 1200 Weisco pistons that i can have if the jugs can be bored out
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The pistons has to match the heads, 883 heads go with dished piston. The later cylinders cannot be bored to 1200. The best, read Hammer Performance instruction.
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Default

UNless money is really tight, best to buy new.
Best to have the rings and pins fitted to the cylinders.
Shipping of old cylinders, cost of boring, honing and not having a guarantee makes it an iffy deal, especially if you are a forum member (10% discount) or buy at sale time.
Lots of details to get it right.
We are pulling for you to get it done proper.
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thanks. So do the cylinders have to be 2004 up for mine because of the fins or will any fit as long as its for an evo engine. Can 883 cylinders be bored out to 1200 or are they totally different. Also will standard 1200 jugs go straight on or do they have to be a specific conversion type. Basically i have a friend who has some 1200 Weisco pistons that i can have if the jugs can be bored out
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Pistons are new and we have a re-bore guy that works for team Honda racing. But if the later ones cant be bored out i wont bother. Thanks all
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Quote:
Originally Posted by 93trident View Post
thanks. So do the cylinders have to be 2004 up for mine because of the fins or will any fit as long as its for an evo engine.
Rejean gave you the right answer to the above question, in this post:

Quote:
Originally Posted by rejeanprimeau View Post
Any Evo cylinder will fit but 2004 and later has big fin.
Evo cylinders first came out in 1986 and continue to this day. So any 1986-present cylinder will physically fit onto your bike.

What he's warning you about is that there was a change in fin size in 2004. This was done to improve cooling. A corresponding change in the fin size on the heads was made at the same time.

Likewise, a small fin cylinder will probably need it's lowest fin on the pushrod side ground a little, to clear the pushrod cover bases.

So the concerns in going to a 1986-2003 small fin cylinder are:
  1. reduced cooling capability
  2. appearance mismatch to the heads
  3. modification of the lowest fin on the pushrod side

Quote:
Can 883 cylinders be bored out to 1200 or are they totally different.
Again, Rejean gave you the right answer:

Quote:
Originally Posted by rejeanprimeau View Post
The later cylinders cannot be bored to 1200.
To be more specific, in late 2008 HD changed the cylinder construction and the cylinders cannot be bored to 1200 anymore. Cylinders older than that can be bored to 1200. See this service bulletin for more information: http://www.hammerperf.com/M1267_883_cylinder_change.pdf

Quote:
Also will standard 1200 jugs go straight on or do they have to be a specific conversion type.
The concern with 1200 cylinders is what Turbo Sporty 48 was getting at in this post:

Quote:
Originally Posted by Turbo Sporty 48 View Post
Best to have the rings and pins fitted to the cylinders.
Proper fit of the cylinders and pistons is important for both performance and longevity. If the pistons you're getting are standard bore, and the cylinders are standard bore, then you may or may not have a proper fit. The right way to do it is to bore and hone the cylinders to a precise size such that you get the proper piston to cylinder wall clearance. You can't do that if your cylinders and pistons are already standard bore.

Also, pay particular attention to this comment by Rejean:

Quote:
Originally Posted by rejeanprimeau View Post
The pistons has to match the heads, 883 heads go with dished piston.
This is really, really critical. 883 heads have very small chambers as compared to 1200 heads. When you put standard 1200 pistons under these small chambers, the compression ratio goes sky high. It's no longer a pump gas motor at that point.

To solve that problem, you get what's called a "conversion piston". A conversion piston has a dish in the middle of it, to allow it to be used under an 883 head and yet give a pump gas friendly compression ratio.

Watch this video for a more thorough explanation:

The Basics of Converting an 883 to 1200/1250/1275


And finally, since your bike is a rubber mount, there's one other important consideration. Stock type 1986-2003 pistons, when put in your motor will break off your oil squirters. Lots and lots of guys discovered this the hard way when the rubber mount motors first came out. It's a full tear-down to fix it. So make sure the pistons you use are compatible with your oil squirters.

Good luck.
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Perfect thanks, yet again its been an education with plenty of help.
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