Added reply in a thread Seized oil drain bolt 1/23/2015 7:45 AM
In the future, buy a set of 6-point sockets. They will save you similar headaches. BTW, even though I've been wrenching on bikes since 1973, I always use a torque wrench on oil drain bolts.
Added reply in a thread Bought a nice 1980 Yz 250 yesterday 1/22/2015 4:33 PM
I can do that, or you are welcome to swing by and pick it up anytime. If you decide that it will work, you can pay me later.
Added reply in a thread Bought a nice 1980 Yz 250 yesterday 1/22/2015 1:07 PM
I have one that I made for my '87 CR that you can try out and see if the spacing fits. You may need some spare RM bar mounts, unless the YZ bar mounts have removable bolts like the RM mounts. You'll also need some new hardware to complete it. Randy Porter
Added reply in a thread Bought a nice 1980 Yz 250 yesterday 1/22/2015 12:35 PM
I use an aluminum plate to remount the bars directly over the fork of my '82 RM250. Makes the ergos feel modern and much less cramped.
Added reply in a thread FOX Shox Twin Clicker 1/16/2015 2:19 PM
$872 in today's money, according to the us gov's inflation calculator.
Added reply in a thread What would happen if you ran straight octane booster? 1/16/2015 2:11 PM
If you put straight Toluene in your bike, it would not start because it's Reid Vapor Pressure is very low. When I was running my car on nitrous, I added 2 gallons of Toluene to a 1/2 tank of 93 octane gas. This would give me 98 octane, which was enough ... more »
Added reply in a thread Lucas 2 stroke oil for break in? 1/16/2015 1:27 PM
That's why you are seeing blow-by. Next time, run a ball type glaze breaker through your cylinder when it is off. Then clean the cylinder with hot soap/water and a plastic scrub brush. Once it's clean, use contact cleaner with paper towels until no dark ... more »
Added reply in a thread Lucas 2 stroke oil for break in? 1/16/2015 9:11 AM
Are you assembling the top end wet with oil on the cylinder/piston/rings. If so, that is probably causing your blow-by issues.
Added reply in a thread Lucas 2 stroke oil for break in? 1/16/2015 7:37 AM
I'm anal, so I would pull it back down, but it will still run if you don't. You just might not make as much power and accelerated wear if you end up with a glazed cylinder wall.
Added reply in a thread Lucas 2 stroke oil for break in? 1/16/2015 7:08 AM
The heaviest oil you should assemble a new 2-stroke top end with is WD40. Putting premix oil on the piston/rings/cylinder inhibits ring seal.
Added reply in a thread FOX Shox Twin Clicker 1/16/2015 3:05 AM
They get 8 months of winter up there in MN and it makes people ornery.
Added reply in a thread Lucas 2 stroke oil for break in? 1/16/2015 2:21 AM
Did you slop 927 on the piston/rings/cylinder when you assembled it? If so, good luck with ring seal. You'll probably end up with a lot of blow-by in that engine.
Added reply in a thread Lucas 2 stroke oil for break in? 1/15/2015 8:35 PM
Lucas is good oil and it will work fine for break-in. It is a light viscosity oil so mix it at a lower ratio than you would with a "racing" oil. If you are a fast mx'er riding a 125 on soft tracks, mix it at 24:1.
Added reply in a thread cylinder plating? 1/14/2015 6:34 PM
Millenium, Powerseal, Langcourt, US Chrome. Take your pick. They all do good plating for about $200.
Added reply in a thread YZ250-Extreme Pitting Problems 1/14/2015 12:57 PM
I get my 100LL from a couple of smaller airports with self serve pumps. They both have open pedestrian access to the pumps through unlocked gates. Running $4.40/gal right now.
Added reply in a thread YZ250-Extreme Pitting Problems 1/14/2015 12:54 PM
If they take .010" out of the squish band alone, you'll add about 0.5cc to the volume of the head.
Added reply in a thread YZ250-Extreme Pitting Problems 1/14/2015 9:03 AM
Sorry for the confusion. When I said to mill the head for more volume, I more specifically meant to mill the head's dome, not the gasket surface. I've been running 100LL for 35 years. It is great 2-stroke fuel, but it does not have enough octane required ... more »
Added reply in a thread YZ250-Extreme Pitting Problems 1/14/2015 8:32 AM
There are a number of factors to consider. We know the YZ's compression ratio is on the ragged edge end of detonation with pump premium gas. This makes fuel quality and elevation critical. If you are at high elevation, you won't need as much octane as ... more »
Added reply in a thread YZ250-Extreme Pitting Problems 1/13/2015 5:02 PM
In 2011, Yamaha took 0.5cc out of the combustion chamber to lower the compression and make the YZ250 more pump gas friendly. If you are running an older YZ on straight pump, you are playing Russian Roulette.
Added reply in a thread A lesson in tire Air Pressure. 1/12/2015 3:30 PM
Here's an accurate US made 0-20psi gauge for $7.99. http://www.northerntool.com/shop/tools/product_200321157_200321157