Usually once the inner two pistons are in it's a bit easier to get the outboard pistons installed. If someone fairly strong is helping you it's not that hard to compress the outboard rings with your fingers as the cylinders come down. The cylinder bores do have a taper inside at the bottom to help get the rings in.
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'81 550T…ring job
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mike_of_bbg
Originally posted by cowboyup3371 View Post
Originally posted by cowboyup3371 View Post
Originally posted by cowboyup3371 View Post
Originally posted by cowboyup3371 View Post
Usually once the inner two pistons are in it's a bit easier to get the outboard pistons installed. If someone fairly strong is helping you it's not that hard to compress the outboard rings with your fingers as the cylinders come down. The cylinder bores do have a taper inside at the bottom to help get the rings in.
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Suzuki_Don
[QUOTE=Steve;1251497]You have a big-bore kit on your 550?
The stamp on the cylinder block sure looks like it says "673 cm^3" /QUOTE]
Yes STEVE, it has a big bore kit and out of interest with the 1mm overbore it gives 700cc or 699cc to be exact.
The hp figures for the bikes of that era were:
GS550 -- 49hp
GS650 -- 73hp
GS750 -- 72hp
GS850 -- 77hp
The 650 swish head with centrally sited spark plugs gives the extra power as well for the 2-valve motor, add less weight that the 850, add a 6-speed transmission.
It's all looking good. Only about 1 hours work to be done before I can do the initial startup after 2 1/2 years work on this project.
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Wow, give us some sources and prices!
Hey Don,
Way cool! Can you give us some sources and prices for that job? We'll really appreciate it!
Bill
[QUOTE=Suzuki_Don;1251827]Originally posted by Steve View PostYou have a big-bore kit on your 550?
The stamp on the cylinder block sure looks like it says "673 cm^3" /QUOTE]
Yes STEVE, it has a big bore kit and out of interest with the 1mm overbore it gives 700cc or 699cc to be exact.
The hp figures for the bikes of that era were:
GS550 -- 49hp
GS650 -- 73hp
GS750 -- 72hp
GS850 -- 77hp
The 650 swish head with centrally sited spark plugs gives the extra power as well for the 2-valve motor, add less weight that the 850, add a 6-speed transmission.
It's all looking good. Only about 1 hours work to be done before I can do the initial startup after 2 1/2 years work on this project.1982 GS1100G- road bike
1990 GSX750F-(1127cc '92 GSXR engine)
1987 Honda CBR600F Hurricane
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Got them up the holes…
Yes, I got dem in dere!
Took 2 hours of fiddlin' though. This ain't a job for a squid. What it say in the manual is simple and correct, but you have to have lots of patience, and the mechanical gift to get it done.
This is what I can ad to the data base, these made it easier for me, little steel strips inside the hose clamps.
1982 GS1100G- road bike
1990 GSX750F-(1127cc '92 GSXR engine)
1987 Honda CBR600F Hurricane
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Suzuki_Don
Originally posted by Buffalo Bill View PostYes, I got dem in dere!
Took 2 hours of fiddlin' though. This ain't a job for a squid. What it say in the manual is simple and correct, but you have to have lots of patience, and the mechanical gift to get it done.
This is what I can ad to the data base, these made it easier for me, little steel strips inside the hose clamps.
Great you got the job done. I will probably do a project write up on my whole conversion in the near future and will not clog up your post with all the infinite detail. BTW there are a couple of other posts in the search feature on this conversion from 550 to 650 or to put it another way from 49hp to 73hp (49% increase in power).Last edited by Guest; 07-24-2010, 09:13 PM.
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Bike is running, have taken test ride, but…
Yes, I got it all back together and have ridden 40 miles!
I rode down some lonely country roads and did a lot of up and down the RPMs to set in the new rings. I'm following advice from Dan's Repair Info web site: http://www.dansmc.com/engine_breakin.htm
The bike has a problem though, it won't hold an idle without some help on the throttle, and raising the fast idle is not the solution. This problem predates the ring job. I hope it's just a mixture or cleaning issue. It seemed to develop slowly last fall.
Bill1982 GS1100G- road bike
1990 GSX750F-(1127cc '92 GSXR engine)
1987 Honda CBR600F Hurricane
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Suzuki_Don
Originally posted by Buffalo Bill View PostYes, I got it all back together and have ridden 40 miles!
I rode down some lonely country roads and did a lot of up and down the RPMs to set in the new rings. I'm following advice from Dan's Repair Info web site: http://www.dansmc.com/engine_breakin.htm
The bike has a problem though, it won't hold an idle without some help on the throttle, and raising the fast idle is not the solution. This problem predates the ring job. I hope it's just a mixture or cleaning issue. It seemed to develop slowly last fall.
Bill
At what mileage do you intend to retighten the head bolts.Last edited by Guest; 07-26-2010, 08:24 AM.
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Mixture-pilot screws…
Originally posted by Suzuki_Don View PostBB it sounds like you are too lean on one or more of the carbs at idle. Try a mixture adjustment. Check which spark plug looks lean. Also do a vacuum synchronisation to get all thrttle valves equally adjusted.
At what mileage do you intend to retighten the head bolts.
I haven't thought about a torque re-tightening, but now I remember that from my race car days 20 years ago. Maybe after 200 miles, as I will change the oil and filter too.
Thanks for the reminder.1982 GS1100G- road bike
1990 GSX750F-(1127cc '92 GSXR engine)
1987 Honda CBR600F Hurricane
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Suzuki_Don
Originally posted by Buffalo Bill View PostI went through a carb tuning in March-2009. Ran good at that time. I will do it again. Just a quick look at the pilot screws I see they're 3 turns out, the service manual spec.s show 3-1/2 out.
I haven't thought about a torque re-tightening, but now I remember that from my race car days 20 years ago. Maybe after 200 miles, as I will change the oil and filter too.
Thanks for the reminder.
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