Decision 550 or 650?

chilledspode · Feb 15, 2008

I am trying to help a buddy who about to make the jump from KTM to Hbg.

He wants a FS650 but they are getting hard to find but he has found a 07 FS550e and has asked the question:

If I want more stove can I easiiy change the 550 to a 650 - the strokes are the same but can someone tell me if this work. What about, head, cam, ignition, pipes, etc?

Thanks

Mark

faktor · Feb 15, 2008

Just buy the 650 its easier...

Goran · Feb 15, 2008

+1
Try harder.
If he _wants_ 650, he wont be happy with 550!

chilledspode · Feb 15, 2008

Well, it's done

He now owns a 07 550 and we shall see if it is enough stove...another orange guy gone blue (in this case black)

I am still curious though - can a 550 be retrofitted into a 650?

Cheers

Mark

Taffy · Feb 15, 2008

now let's see?

the 650 has a an 11.3mm longer stroke. so we want a 10mm or so shorter rod. the 550 rod is just 123long and 10mm off that at 113mm is out of the question.

the answer is NO!

regards

Taffy

chilledspode · Feb 15, 2008

Thanks Taffy

Sorry to waste people's time - the first time I looked over the engine technical specs on the Hbg at the model level I misread it - the bores are constant not strokes....

Cheers

Mark

bushmechanic · Feb 15, 2008

I inquired as to the posibilities of increasing 550 displacement with a JBS kit as I nearly missed out on a new 650.

I can't recall the exact displacemnts but Ben has a number of options and was considering a kit for the 550 it was around 600cc I think.

I think the plus is you would get a stiffer crank.. nicer on the mains? ..................

can't hurt to ask him.

regards

Decision 550 or 650?

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