gl1200 cams

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BIG T
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#16

Post by BIG T »

ROY, you are quite welcome. i just try to share my knowlege the best i can.....later bro................T. tumb2 tumb2 tumb2 tumb2 tumb2 tumb2 tumb2 tumb2
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Victorious1
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#17

Post by Victorious1 »

bandanna, earlier you had asked if we have any shops that could refurbish camshafts over here. Actually there are many that can do so, but, sadly, not with a hydraulic camshaft on a Gold Wing. Typically with a mechanical camshaft they grind down the base circle of the cam lobe and regrind the profile, then the mechanical rocker arm adjuster makes up for the difference in the finished lobe height. With a hydraulic cam, this cannot be accomplished because the hydraulic lifter of the 84-87 Wing will not make up for this wide variance in tolerance.

If it were possible to have the cams ground to my specs I would gladly pay for this service, but, I have found no takers for my money on this cam job.

If you know of any over there who could reliably refurbish the Gold Wing hydraulic camshaft I would be glad to take their number and investigate further.

Vic
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#18

Post by Bandanna »

IS THERE NO WAY THE ADJUSTMENT CAN BE TAKEN UP WITH SHIMS OF VARIOUS THICKNESSES, LIKE WITH THE CVH TYPE FORD ENGINE??
(OHC ENGINE WITH HYDRAULIC LIFTERS???)

I WILL LOOK INTO THIS VIC AS I AM SURE IT IS POSSIBLE...........

CHECK THIS SITE OUT VIC....

www.surecam.com.au

HAVE YOU ANY THOUGHTS ON THIS ZEE????

SAFE RIDING MY FRIEND..........
YOU ARE WHAT YOU RIDE......THAT MAKES ME AN ANGEL????
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#19

Post by Victorious1 »

I sent them a note and will let you now what they answer. Thanks bandana.

Vic
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#20

Post by Dougal »

bandanna wrote:IS THERE NO WAY THE ADJUSTMENT CAN BE TAKEN UP WITH SHIMS OF VARIOUS THICKNESSES, LIKE WITH THE CVH TYPE FORD ENGINE??
(OHC ENGINE WITH HYDRAULIC LIFTERS???)

I WILL LOOK INTO THIS VIC AS I AM SURE IT IS POSSIBLE...........

CHECK THIS SITE OUT VIC....

www.surecam.com.au

HAVE YOU ANY THOUGHTS ON THIS ZEE????

SAFE RIDING MY FRIEND..........
The shims you refer to are avaialble from Honda, but you need a special tool to set them up. The shims only come in one size - 1mm. Part number 90491-MG9-000

Dougal
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#21

Post by Victorious1 »

Thanks for posting that info Dougal.

I find it interesting that Honda went back to solid lifters on the GL1800. They must have had some difficulties with the hydraulic cams as well.

I would sure like to convert to mechanical lifters in my 84 1200, but haven't come up with a means to do so as of yet. Anybody out there have any ideas?

Vic
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Timber
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Re: gl1200 cams

#22

Post by Timber »

Hi Roy
Great to see that it seems like you have solved your cam problem.tumb2
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#23

Post by Fat_Wing »

bandanna wrote:IS THERE NO WAY THE ADJUSTMENT CAN BE TAKEN UP WITH SHIMS OF VARIOUS THICKNESSES, LIKE WITH THE CVH TYPE FORD ENGINE??
(OHC ENGINE WITH HYDRAULIC LIFTERS???)

I WILL LOOK INTO THIS VIC AS I AM SURE IT IS POSSIBLE...........

CHECK THIS SITE OUT VIC....

www.surecam.com.au

HAVE YOU ANY THOUGHTS ON THIS ZEE????

SAFE RIDING MY FRIEND..........
What about cutting the valve seat and setting the valve lower on the seat? This would bring up the valve stem height at the rocker. Then use shims for the valve springs to make up the loss in the spring.

Just my $.02

FW
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Victorious1
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#24

Post by Victorious1 »

I still haven't got a reply from surecam yet, but, you make a good point Fat Wing. The only drawback I can see to that method is that the valve may be shrouded by the recess and flow could hindered.

Vic
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#25

Post by Dougal »

Victorious1 wrote:Thanks for posting that info Dougal.

I find it interesting that Honda went back to solid lifters on the GL1800. They must have had some difficulties with the hydraulic cams as well.

I would sure like to convert to mechanical lifters in my 84 1200, but haven't come up with a means to do so as of yet. Anybody out there have any ideas?

Vic
I dont know of any problems that Honda hadwith Hydrulic lifters, my 1500 has 99500 miles with no prblems and I know of many 1200's and 1500's that have manymore miles than that.
I think the solid lifters fitted to teh 1800 were a backwards step.

Dougal
They say WHY?, I say why not.
If God had intended motor cycles to be standard, he would'nt have given us the hacksaw.
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#26

Post by Victorious1 »

Hi Dougal, Honda had a lot of problems with noisy lifters and even had recall campaigns to fix them. I'm working with some guys with 1200's who can't get their lifters to quiet down even after installing new lifters.

I've never had lifter problems with my own bike and the only problem I have with the hydraulic lifters is that I can't find anyone who can grind modified cams for me. If I had solid lifters I could get custom cams just about anyplace.

Vic
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#27

Post by Bandanna »

VIC....

SOMETHING I DISCUSSED WITH A FRIEND.......
QUESTION.......

IT WOULD APPEAR,THAT IF YOU TAKE MATERIAL AWAY FROM A CAM LOBE,THAT IT COULD NEVER HAVE MORE LIFT OR DURATION THAN IT ORIGINALLY HAD.

HOWEVER,WHEN I LOOK AT SOME RE-GROUND CAMS,THEY HAVE HIGHER LIFT+MORE DURATION THAN THE ORIGINAL CAM!!!
HOW IS THIS POSSIBLE????
ARE THERE ANY PROBLEMS NORMALLY ASSOSCIATED WITH A RE-GROUND CAM???

ANSWER..........

THEY SIMPLY GRIND THE LOBE ROOT SMALLER..........
IN OTHER WORDS,LEAVE THE TIP AT THE MAXIMUM LIFT WHERE IT IS,AND GRIND THE REST OF THE CAM SMALLER.
IF YOU LOOK AT THE SIDE PROFILE OF THE CAM LOBE,YOU CAN GRIND ANY LOBE PROFILE YOU CAN IMAGINE THAT WILL FIT INSIDE THAT ENVELOPE....
IT CAN EVEN CHANGE THE CAM TIMING A LITTLE,AS LONG AS THE LOBE FITS WITHIN THE MATERIAL IN THE EXISTING CAM LOBE.........
DONE WITHIN REASON,IT GIVES A VERY SERVICEABLE CAM..
THE LOBES NEED TO BE RE-HARDENED,BUT REPUTABLE RE-GRINDERS DO THIS ROUTINELY..........

QUESTION..........
SO I CAN UNDERSTAND HOW IT CAN GIVE MORE LIFT???
SO DOES IT MAKE THE LIFTER SIT LOWER,WHILE IT IS ON THE BASE CIRCLE????
DOES THAT NOT CHANGE THE VALVE GEOMETRY????

ANSWER............
YES IT DOES CHANGE THE VALVE GEOMETRY...
IF YOU HAVE NON-ADJUSTABLE ROCKERS LIKE MOST HYDRAULIC CAMMED ENGINES,YOU WILL BE HUNTING FOR CUSTOM LENGTH PUSHRODS,OR AN ADJUSTABLE ROCKER SET UP...........



WHAT,S YOUR VIEWS ON THIS VIC???
HAS IT ANSWERED SOME OF YOUR QUERIES??

HAS IT GIVE YOU ANY THOUGHTS???

HOPE IT MAY BE OF SOME USE MY FRIEND........... tumb2
YOU ARE WHAT YOU RIDE......THAT MAKES ME AN ANGEL????
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Victorious1
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#28

Post by Victorious1 »

Thanks for taking the the time to post that info Bandana.

Some cam regrinders will weld up the cam lobe and regrind it, while others will grind off the bottom of the lobe circle and recontour the profile. In any case the cam still must be heat treated and from what I understand the cam will never give the same life as the original factory piece for whatever reasons.

It would be nice to get some direct info from a cam rebuilder and get the full story on why everyone I have contacted so far cannot rebuild the GL1200 cam. There must be some solution out there someplace.

Vic
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