650Rider, xs650 hosted by XS650.com

What Happened to 650rider.com?

650 Rider went offline for about a month at the beginning of 2010. In order to save the technical information that was here, XS650.com acquired the site and brought it back online as a read-only archive. If you were a member of 650 Rider, you will need to re-register at XS650.com
Search 650Rider.com and XS650.com using Google!
        650Rider Menu
 Community  Information


xs650 > > High Performance Modifications > > Top End Work > > newb question


newb question
    Forum Index -> Top End Work
Author Message
benjamoid14
Full Member
Full Member


Joined: Sep 01, 2009
Posts: 37
Location: SLC
PostPosted: September 22, 2009, 2:03 pm    Post subject: newb question
This may be a dumb question, and I hope I dont get flamed for asking. Has anyone ever done or heard fo anyone "decking" the head to bump the compression up a bit? Or will valve contact piston if that is done? Im getting ready for a full rebuild and wondering if it would work. thanks
_________________
81 xs650 special II
Back to top
jayel
650Rider Supporter
650Rider Supporter


Joined: Apr 16, 2006
Posts: 3417
Location: SE Iowa 1974 TX650A
PostPosted: September 22, 2009, 2:57 pm    Post subject: Re: newb question
it would work but will effect cam timing, easier to throw in hi-comp pistons
but then again you run into the fuel nowadays is not high compression friendly, if you want a faster bike for anything but vintage racing why bother, buy a ready made go-fast
_________________
all it takes is time and money -- Where are we going and why are we in this hand basket?
Back to top
Photo Gallery
benjamoid14
Full Member
Full Member


Joined: Sep 01, 2009
Posts: 37
Location: SLC
PostPosted: September 22, 2009, 4:23 pm    Post subject: Re: newb question
Ok, i just figured i would ask. I just found out that I need to rebuild the motor so im just tossing ideas around. This is the first time im doing any internal ingine work on a bike. I know some about car engines but not much about bikes. Do you know who sells high comp pistons?
_________________
81 xs650 special II
Back to top
pumps
650Rider Supporter
650Rider Supporter


Joined: May 29, 2007
Posts: 1993
Location: Kansas City, Missouri, U.S.A.- 1977 XS650 "D" Standard
PostPosted: September 22, 2009, 4:42 pm    Post subject: Re: newb question
Just a comment about compression. xsjohn has LOWERED his compression by stacking two head gaskets I think and retarding the timing a bit, to make his bike more rideable he says. . Less vibration, heat, and it's a better ride he says. I'm not saying that is what you should do. Just some interesting info.
_________________
You don't HAVE to be crazy to run into burning buildings, but it HELPS!
On an XS you won't pass yourself on the road everyday. Wink

My Bikes
Back to top
Photo Gallery
nj1639
Full Member
Full Member


Joined: Aug 22, 2007
Posts: 839
Location: Switzerland County, Indiana
PostPosted: September 22, 2009, 7:13 pm    Post subject: Re: newb question
Much smoother with the lowered compression. I no longer grit my teeth when I ride, and with the 18/30 gears I no longer wish for an overdrive.

I used to hear Peggy Lees' "Is That All There Is?" in my head while riding. Now it's more like "The Long and Winding Road" and "Grandpa Got Run Over by a Reindeer".
_________________
"Go ahead, turn the damn power and water off, I'm ready!
'83 xs650sk
www.650rider.com/index...pic&t=5392
Back to top
benjamoid14
Full Member
Full Member


Joined: Sep 01, 2009
Posts: 37
Location: SLC
PostPosted: September 23, 2009, 9:11 am    Post subject: Re: newb question
Well im still a young buck at 24, so some vibrations dont bother me. But its something to consider for the future.
_________________
81 xs650 special II
Back to top
 
    Forum Index -> Top End Work All times are GMT - 5 Hours
Page 1 of 1


 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum


   


Check out the new Honda CB750 Forum at CB750.com! A site dedicated to the great Honda SOHC and DOHC CB750.

Check out the new Yamaha XS400 Forum at XS400.com!

Yamaha xs650

xs650, xs, 650, forum, links, chopper, custom, yamaha, parts, forum, info, information, bb, bulletin board, XS650
650Rider, Free Unrestricted xs650 forum, Personal photo albums, Post images in Forum, News columns, Daily blog, Links, Event calendar, Information for Yamaha XS650



Interactive software released under GNU GPL, Code Credits, Privacy Policy