Getting the exact width of the tire from the manufacturer, or better yet measuring it yourself before purchase, is an excellent idea. Some tire manufacturers provide different width tires even though their tire sizes may be marked the same. I know that sounds odd, but below is a picture I took of two different model Michelin tires that were supposedly same size as marked but in reality were different widths. Ed
Getting the exact width of the tire from the manufacturer
This is definitely critical. The numbers on the side of the tire are only roughly what you'll get. I always look up the full dimensions on the manufacturer site, and I will never buy a tire from a company that doesn't provide detailed dimensions.
For example, even within the Roadrider Mkii sizes, the 130/70 is 133 wide, but the 130/80 is 137. The 120/80 is 120 wide, but the 120/70 is 129.
I run a 120 on the rear of my Z1R, which just barely fits without rubbing on the chain guard. The difference between an actual width of 120 and 129 would very likely be enough to rub on my bike.
'78 Z1-R in blue, '78 Z1-R in black, '78 Z1-R in pieces
'95 GPZ1100 (sold) , '00 ZRX1100
And the 100/90-19 isn't really the same size. From the roadrider mkii site:
100/90-19: 109mm wide and 26.4" diameter
3.25-19: 98mm wide and 26.1" diameter
That 10mm width different might be enough to touch the fender, depending on the model.
Both of the sites I linked are listing 2 AM26 tires, one the racing version and one not. Both are Canadian sites, as is the OP. I'm currently running an AM26 4.00 x 18 rear (non-racing) and a 100/90-19 AM26 (non-racing) on my KZ1000A1 which has the same dimensions as the OP's A2.
I think the brand change was done this year, so the MKII might be a replacement for the AM26 non-racing tire.
Edit: I just measured my AM26 front which was installed last week, 100/90-19 and it's 99.5mm wide.
650ed - a folding wooden ruler?! I haven't seen one of those since my grandfather was around!
Geez, maybe I'm getting old. Is there some other kind of newfangled ruler available nowdays? Ed
I caught that too! (Hee Hee!!) As a miner working underground a folding rule was an essential tool. I don't think I have any around but I know I have a folding degree rule with a level bubble. We used them when driving raises.
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.
Got the forks back together last night. I swear I put the same amount of fluid in each, but upon doing the "dip test" one seemed to have way more than the other. They are back in the bike now, so I'll give fluid some time to settle, the recheck levels.
I can not for the life of me get the front brake to bleed properly. Got sick of screwing around so went and picked up a vacuum pump. Ran that until nothing but good clean fluid came out, but the brake handle still pulls all the way to the bars with no resistance. Help!