Grenaded Engine

[jonathan180iq]

Originally Posted by bmw633

Would putting on a 16 tooth front sprocket help with anything?

If she is stubborn enough to want to pull 75MPH on the highway again, the 16T sprocket won't let her do it. She'll be maxing out around 70MPH or so and with lower revs. So it would possibly help. You could slap one in there and force her to slow down because of it... But then she might not like the bike afterwards, and you don't really want to deter a new rider from experiencing the ride and enjoying their machine.

A single upjet would help the thing run a touch cooler. I would only go one size though, if you're looking at keeping everything else stock.
This is a procedure I've used on the last 3 bikes I've had. Small engines have to work harder than bigger ones to do the same thing. That's just a fact. Anything that we can do as users to limit the stress the engines have to endure are little check marks in the list towards engine longevity.
My cool-down favorites include:
-Slightly larger gearing (Weights in scooters)
-Slightly oversized jets (very slight - you still want it to run right.)
-High end oil

Keeping up with all the other maintenance is necessary before those things work, obviously. A leaking carb inlet, for example, or a leak anywhere else will throw your little tweaks out the window. Causing a leaner condition on top of your upjet. But you already know that.

[raul10141964]

my cruse a 75+ mi
my settings are:
main jet 140
pilot 3 turns
needle mod
16T
filter mode

[bmw633]

I placed an ad for an engine for the GZ, and a guy is trying to sell me his GZ250 with a bad exhaust valve for $250. It has a new battery and new tires, and has a title. I am thinking about it, but am hesitant to buy another Zuki with an engine that is prone to having exhaust valves break off.

Is this bike a 10,000 mile engined motorcycle? How long can I expect these to last with some 60mph cruising. I use Mobil 1 synthetic oil and never skimp on maintenance.

Seth Anderson
Moon, VA

[JWR]

Read this account.

The GZ only had 35,000 miles on it when he left for Alaska.




http://home.comcast.net/~pat1776/Alaska05/

[Water Warrior 2]

Originally Posted by bmw633

I placed an ad for an engine for the GZ, and a guy is trying to sell me his GZ250 with a bad exhaust valve for $250. It has a new battery and new tires, and has a title. I am thinking about it, but am hesitant to buy another Zuki with an engine that is prone to having exhaust valves break off.

Is this bike a 10,000 mile engined motorcycle? How long can I expect these to last with some 60mph cruising. I use Mobil 1 synthetic oil and never skimp on maintenance.

Seth Anderson
Moon, VA

Cruising at 60 is well within the GZ's ability. But be forewarned, hills and headwinds will be a bit tough on occasion. Ride the GZ within it's capabilities and it will likely never leave you stranded.