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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #1  
Old 20th September 2005
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Monteagle Monteagle is offline
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Talking 05 883 to 1200 Tomorrow...YES!

Now is time for the change over as the dealer will be replacing the valve guides Tuesday/Wednesday so I bought the SE cylinders, SE pistons and a base gasket set and the dealer will install for me. Good timing actually but kinda sucks about the valve situation.

I ride reasonably hard (when safe to do so!) and am looking forward to the extra omph to pull me out of the twistys without downshifting. One of the guys I ride with has a 1600 V-twin and he just cracks the throttle a bit and hopefully that's all I will need to do too.

So now the bike has the stage one complete as well as the conversion. There should be a noticable change - right?

Question - and this may be best in another forum: I'm not overly impressed with the sound from the SEll's exhaust note as its sound isn't deep enough. Has anyone that has gone through with the conversion noticed a change in sound.
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Old 20th September 2005
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Quote:
Originally Posted by Monteagle
Has anyone that has gone through with the conversion noticed a change in sound.
I think it's a good question.
As far as I know, the only change in sound will come from increased compression ratio but I don't think it will be deeper. Maybe just a bit more crackle to it.
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  #3  
Old 23rd September 2005
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Quote:
Originally Posted by Predator
As far as I know, the only change in sound will come from increased compression ratio but I don't think it will be deeper. Maybe just a bit more crackle to it.
I just picked the bike up after the conversion and the exhaust tone is slightly deeper in tone but not by much at all.

What a difference in performance though!
Still looking for a tad more snap in the top end (roll-on in 5th) and hoping it may happen after 300 or so miles are racked up.

Well worth the $ and I'm glad I did the conversion. BTW, the dealer had the bike back to me in two days and you can't tell anything was done to the engine which is the highest praise I can give. Great workmanship - at least the stuff you can see.

Last edited by Monteagle; 23rd September 2005 at 01:30..
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Old 23rd September 2005
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if you dont mind me asking how did the se parts compare price wise with the other after market stuff out there
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Old 23rd September 2005
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Tcspannerwrench,

It works out as follows:


Looking at the invoice:

SE XL pistons (2) - $305.34
CYLINDER, MACHINED - $305.33 (don't know why it says machined)
DOWEL PIN (10 per pack) - $4.85

For a total of $615.72 in parts

Gaskets were covered under warranty and labour was mostly covered under warranty (problem with the valves). I had to pay for two hours which worked out to $110.85.

The total parts and labour: $726.57.

Last edited by Monteagle; 23rd September 2005 at 01:46..
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Old 23rd September 2005
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sounds like a fair price for the upgrade
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Old 23rd September 2005
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The only issue is the pistons are not matched to the cylinders. You bought a generic SE kit. The cylc are all bored to the same size but are not fit the the pistons. You may get poor ring seating or have to much side clearance on the jugs. That is the only problem buying a "KIT". There is no accountablilty to anyone for fit anf finish.
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Old 23rd September 2005
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Not a bad price from a Dealer!!!!
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Old 23rd September 2005
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Quote:
Originally Posted by barry1967
The only issue is the pistons are not matched to the cylinders. You bought a generic SE kit. The cylc are all bored to the same size but are not fit the the pistons. You may get poor ring seating or have to much side clearance on the jugs. That is the only problem buying a "KIT". There is no accountablilty to anyone for fit anf finish.
I am fully aware of the issue. I have never encountered any problems with my dirt bikes that I rebuilt and they were rode to extremes. My Sportie will not so I'm gambling, perhaps but I think it will be ok. Hopefully, I'll never have to eat those words though!

If a problem occurs, I'll fix it and chaulk it up to a hard lesson learned.
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  #10  
Old 23rd September 2005
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I was jusy giving you an FYI. Have fun with the extra ooomph
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