IMO the best tires you can run on a C10 with stock size wheels are the Avon radials. you would be looking for the Avon Azaro ST46 rear in a 150/80/16 and an Avon Storm 2 ultra
ST55 front in a 110/80/18. I've run these for several years and many miles and they have given me everything I expect out of a set of tires. There are tires that may give you a little more mileage, but not the crisp handling and stick these tires will give you.
Good Luck and I'm glad you are enjoying that C10, you will enjoy it even more with good tires.
That 130/80 18 size front tire will not work on an 87. The 2.15 front rim is far too narrow for that tire.Excellent point.
They are pretty good "sleepers" though. They'll do 90 or so all day though.
+1 on T Cro's comments!
I got to ask, red one or silver one? I have both.
I run the Shinko Journey SE890 in 160/80R-16 in size for the rear. So far a great tire. Its a little taller and wider than stock. A few others haven't liked them. Air pressures are your choice but most run 40 up front and 42 in the rear. Don't forget to check the fork and shock pressures too. I run the max in the forks and 35 in the shock on setting 3.
As for your shock - rebuild it yourself. This isn't really a "rebuildable" shock. Remove it, then drain the fluid out thru the airline hole and refill it with the same amount of shock fluid.
Here's a link to a handy kit:
http://www.murphskits.com/catalog/product_info.php?cPath=1_97&products_id=119
Murph's will be an addiction for a while...
There is no easy or cheap way to install a wider front rim from the later model Concours due to axle as well as wheel bearing size difference; one of the only ways to do this is with an entire front end forks, brakes etc...No, I have not ever rode a dressed bike, I was pretty sure that was a factor.
As to the wobbles lets start with these simple questions.
Have you ever rode a fully faired bike before? They be a worlds different than an open naked bike.
Does the bike have a stock or aftermarket windscreen? Stockers were awful.
Does the bike still have the black lower boot scoops? These cause turbulence.
A loose steering stem bearing can lend itself to the wobbles.
Worn and improperly inflated tires can make for a squirrelly ride too.
As commented no other tire combo but the stock 150/80-16 rear & 110/80-18 front is recommended for the early models with the narrow front rim.
With the upgraded 17" wheels, ZRX front end and ZZR rear shock the main problem I have is that the bike is now so dam smooth & stable up to and past the ton that I've got to watch my speed when slabbing it as I'll get to 90ish and not even notice it...
A Yamaha XS1100 that can do 160 with lots of throttle left?
I got some ocean front property in Arizona....
You need a new speedymeter.
BTW-the XS1100 was last produced in 1981.
+1 on the increased air pressures and head bearings.
Sounds like most people stay with the 110/80-18 front. What other sizes have been successfully tried?Was wondering about that.
Same for the rear 150/80-16. What other sizes work?
I notice looking thru some specs on the tire sites that a tire can have a larger diameter but yet turn more rev's per mile. Maybe that was a typo.