Red Green is smiling down on you, brother!
He'd be so proud!

Serowbot wrote on 04/27/12 at 18:25:32:

..and your calipers look very scientific!  

Well , I am new in the forum, but I've been using a kawasaki 454 LTD front pulley (25 teeth) for like 6 months and everything seems to be perfect , no noise from the belt , any false movement; I also put a 90/140 rear tire and with the mix of those two mods the bike runs smooth , faster, without vibration. I checked my speedometer while riding with a friend and when he was at 70 mph I was doing 59 mph at the same speed. For sure the front pulley mod works using a lot less rpms , you also can use a kawasaki en500 vulcan front pulley (1990-1995). And there is something that everyone with a savage or s40 should know, that if a pulley from a kawasaki 454 or en500 can be use in our bikes, we can use also the belt drive from them, wich I believe the one from the 454 is a litter shorter than ours , but the one from the en500 is like 3 or 4 teeth larger with the same pitch and everything. But there's more; I haven't done it yet , but I can bet that both kawasaki's spokeless rear wheels can be use in our bikes also, including rear brake hub and everything(this is gonna be my next mod)

Hi John, I recommend the work to be done in a lathe where there is no chance of error in the internal and external messurament, every side depth has to be the same as the original pulley to be able to work just fine.

Sirimbaguayacol wrote on 07/21/12 at 16:00:05:

Yes, a carbide lathe tool and a little patience should yield great results.
I wish I could afford a real nice lathe. As a machinist with a different occupation, I DO miss running a lathe. If I had one, lots of things would be different on my bike by now. Including doing stuff for others.

so, i draw a total of approximately 1000 or can more miles after installing bigger pulley.As I said, pulley came without any alterations and mileage is currently about 1,000 km in different speed modes... this upgrade is very good (in my personal feelings), if your trips are mainly outside the city.... inside the city's traffic was not very convenient, because the acceleration times are significantly lower. but at a suburban highway travel was much better. acceleration smooth calm and confident... well something like that... in General "to each his own"

Sirimbaguayacol wrote on 07/21/12 at 14:13:48:


 So,.. is the Kaw belt the same as an LS650 belt, but longer?  (more teeth?)

verslagen1 wrote on 08/24/13 at 10:39:31:



This might be useful on a RYCA bike with the 18" rear tire.  
 -- There is only about 1/16" range where everything works.
 -- If I move the tire/wheel to the rear far enough for a comfortable amount of clearance on the swingarm, the belt is too tight at full compression of the shocks.  
-- If I move the tire/wheel far enough forward to make sure the belt won't get too tight, the tire rubs on the swingarm.  
 
A larger range of movement would be helpful.