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General Category >> Rubber Side Down! >> DR-650 head on LS650 ?
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Message started by mikestrikes on 09/30/08 at 17:46:39

Title: DR-650 head on LS650 ?
Post by mikestrikes on 09/30/08 at 17:46:39

I keep getting told that a DR-650 head will bolt onto a Savage motor ? I dont have ether here so I cant say yes or no !

Will it............. has anyone try'd................. or just NO !

Title: Re: DR-650 head on LS650 ?
Post by Paladin. on 09/30/08 at 20:38:03

Go to Ron Ayers .com and pull up the microfiche on both bikes. For the two heads to swap they would have to have similar gaskets (holes in the head matching those in the cylinder.) They don't.

Not to mention that the DR650 has a 100mm bore to our 94mm.

But I wouldn't bet that Lancer couldn't make it work.

Title: Re: DR-650 head on LS650 ?
Post by LANCER on 10/01/08 at 05:16:11

497875787D7077190 wrote:

LOL ... I am a tinkerer, not a magician. ;D

Title: Re: DR-650 head on LS650 ?
Post by mikestrikes on 10/01/08 at 08:09:42

This is what I thought and even asked you guys what parts are from other motors and you told me NONE...........

I do know that the clutch is the same as a DR-500 but the rest is for the LS only.....

I wanted to hear it from you guys before I argued it with him...

And yes we can get the 100mm piston to work, I e-mailed a sleeve manufacture and they said they can make a sleeve and bore and install for around $250-$300 for a 100mm bore..

I'll stick with a stock sleeve bored and a fresh piston with a little more comp.....

Thanks guys.

Title: Re: DR-650 head on LS650 ?
Post by KwakNut on 10/03/08 at 01:02:07

4C686A64725573686A6472010 wrote:

And yes we can get the 100mm piston to work, I e-mailed a sleeve manufacture and they said they can make a sleeve and bore and install for around $250-$300 for a 100mm bore..

I'll stick with a stock sleeve bored and a fresh piston with a little more comp.....
.

Good decision. I've overbored a few single cylinder dirt bikes, and a 3mm is pretty radical. You'd be taking a lot of mass from the cylinder and that would limit coolng ability - wth the extra heat generated fom a bigger, higher compression cylinder and less metal to conduct it away, problems would unsue.

Also, don't go too big and powerful on the Savage unless you can find a really special clutch to fit the motor - mine still won't take the torque from my upgades even with uprated springs!

Title: Re: DR-650 head on LS650 ?
Post by Oldfeller on 10/03/08 at 03:39:44

Listen to the man's point about the clutch (he's been there, got two tee-shirts and hasn't gotten back yet) -- much work would have to be done to a LS to get it to go much past 50 hp and still connect that extra power to the ground.

And if you did fix the clutch, what would be the next overstressed part in the power train to give up the ghost? Shift dogs or shift forks? Just guessing, but general durability issues under 2x extra power are quite common in severe hop up bikes.

What you need consider pursuing is the Lancer dual spark plug mod -- do that and you can get 65 hp easy with no durability issues. My Lancer modded 650 Suzuki even gets improved gas mileage at the highest 65-70 hp rating, something that is appreciated more and more now-a-days. Easy on the right hand and she's easy on your wallet.

Title: Re: DR-650 head on LS650 ?
Post by mikestrikes on 10/03/08 at 06:20:45

1B3830323138383126540 wrote:

What you need consider pursuing is the Lancer dual spark plug mod -- do that and you can get 65 hp easy with no durability issues. My Lancer modded 650 Suzuki even gets improved gas mileage at the highest 65-70 hp rating, something that is appreciated more and more now-a-days. Easy on the right hand and she's easy on your wallet.

Please do tell............ got a link to a thread on this ?