Hey guys, I have an 83 650 bored to 750 and rephased and am looking to upgrade my cam to a rephrased shell cam... And I read about having to change valve springs in doing that. So I was just curious what would be the most bang for my buck with aftermarket valve springs.... Every time do a search for some aftermarket springs it always just pops up with the ones from mikes xs.... I would prefer to stay away from those so was just wondering what else people are wondering with a similar set up and find to be the best! Thanks!
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I am Carbon
shade tree mechanic
You can get some good springs at 650central http://www.650central.com/engine.htm
Hi-Performance Valve Spring Kit
These springs are good for cams with up to .450" lift. Top retainers are 7075 T-6 Aluminum.Fit all XSs '72-84. # JCEN28-28600...... $145.00
info@650central.com
emails will be answered as time permits
209-533-4346
You can also get some from Hoos racing http://www.hoosracing.com/650enginepartsprice.html
103-Y R/D Racing Springs aluminum tops $125.00 yes
131-Y Kibblel white Racing Springs Titanium tops $255.00 1 sets
Don't run your performance cam without them
Hoos Racing Phone : 563-940-3363
Email: gary@hoosracing.com
Hi-Performance Valve Spring Kit
These springs are good for cams with up to .450" lift. Top retainers are 7075 T-6 Aluminum.Fit all XSs '72-84. # JCEN28-28600...... $145.00
info@650central.com
emails will be answered as time permits
209-533-4346
You can also get some from Hoos racing http://www.hoosracing.com/650enginepartsprice.html
103-Y R/D Racing Springs aluminum tops $125.00 yes
131-Y Kibblel white Racing Springs Titanium tops $255.00 1 sets
Don't run your performance cam without them
Hoos Racing Phone : 563-940-3363
Email: gary@hoosracing.com
the Norwegian
XS650 Enthusiast
While browsing this page:http://www.xs650.org.au/Club Racer Stuff/Club Racer.htm
i came across this:
Or: http://www.megacyclecams.com/
i came across this:
Or: http://www.megacyclecams.com/
Right, RD springs are fine, and they're what you'll get from 650 Central and Hoos Racing. Aluminum retainers are OK in a race motor with frequent teardown intervals, but not a good idea in a street motor; use OE steel tops or pop for titanium retainers (titanium won't give you much more than bragging rights, not much bang for the buck in a street motor). You're making the right call on staying away from Chinese junk!
RD installation instructions assume that you know how to measure and adjust installed valve spring height; this is critical because it sets the preload on the springs. For those who haven't done the job before, here are some tips.
1. You won't be able to measure from spring seat to top of spring directly. Measure the thickness of the retainer, then use the depth probe of a caliper to measure from seat to top and subtract the measured thickness. Install only the outer spring when taking measurements. Make sure that measurements repeat. Measure for each valve independently--there will be variation.
2. The RD kit comes with a bucket-type spring seat which does not fit all the way down into the head; it stops at the valve guide boss, and this is as it should be, as the bucket will need to sit higher than the boss to achieve correct spring height. Have a bunch of shims of varying thickness on hand to install under the bucket. Be sure that shims fit over the boss so that the stack is supported all the way down, don't leave a hollow space. There's nothing special about shim material, any steel washers will work. Don't act helpless and ask me for dimensions--if you tear into a motor you need to know (or learn) how to take your own measurements.
RD installation instructions assume that you know how to measure and adjust installed valve spring height; this is critical because it sets the preload on the springs. For those who haven't done the job before, here are some tips.
1. You won't be able to measure from spring seat to top of spring directly. Measure the thickness of the retainer, then use the depth probe of a caliper to measure from seat to top and subtract the measured thickness. Install only the outer spring when taking measurements. Make sure that measurements repeat. Measure for each valve independently--there will be variation.
2. The RD kit comes with a bucket-type spring seat which does not fit all the way down into the head; it stops at the valve guide boss, and this is as it should be, as the bucket will need to sit higher than the boss to achieve correct spring height. Have a bunch of shims of varying thickness on hand to install under the bucket. Be sure that shims fit over the boss so that the stack is supported all the way down, don't leave a hollow space. There's nothing special about shim material, any steel washers will work. Don't act helpless and ask me for dimensions--if you tear into a motor you need to know (or learn) how to take your own measurements.
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Stay away from aluminum retainers period. There's a guy on ebay selling Moly retainers, much stronger and lighter than stock. For the Shell cam,pop for the Kibblewhite springs off ebay for under 60.00.
Can one use the kibblewhite valve spring kit if running a 750 big bore, rephrased and a stock cam?
