DIO Piston Install TIPS
These are some tips on installing or taking off your two stroke pistons
from the crankshaft. Always keep the parts clean and take your time and do
the job right. Remember that the piston always goes on with the arrow on
the piston crown, pointed towards the Exhaust port. Put your rings back on or take
them off with a piston ring expander. Rings are very brittle and can snap
in half, very easily. Line the rings up with the single ring pin in each
slot. Oil the rings and cylinder walls with two stroker oil and carefully
lower the cylinder onto the piston. Use a new base gasket , scraping off
the old one. When changing or working with the cylinder off, stuff the
crankcase around the crank rod to stop foreign debris from entering and
fallin in the crank well. Use a new head gasket every time and torque the
head bolts in a cross-hatch pattern to avoid warping the aluminum head.
Take your spark plug and screw it into the head before installing to make
sure the plug sits flush with the top of the cylinder head chamber.
DIO Cylinder Head Dynamics
After market dio heads are all a little different and it is very important
that you have the right plug length for the depth of the cylinder head.
Water cooled heads take a longer plug than the air cooled ones. The point
of this video is just to take your plug and make sure the plug seats well
and is not to deep or too short for your particular head. Remember all the
parts are different and checking them does not cost a dime and could cost a
motor. Dont guess when a question could cost you nothing to ask. RH
Installing main bearings in a Vespa engine
I haven't seen anybody use this method yet. I am too impatient to put
things in the freezer overnight and don't like feeling like I'm in a race
against time to keep the bearing cold. This method obviously works quickly
and easily if you're careful. Playing with a torch and liquid CO2 is
obviously dangerous. Both can cause you quite a bit of pain if you're
Tips for rebuilding the CR 250 crankshaft
Zuma Crankshaft Seized
HELP!!! Can't figure out why the crank binds up after variator and starter
clutch replacement. Once end nut is torqued the whole assembly binds up.
How to Find a Bad Wheel Bearing - EricTheCarGuy
How to Find a Bad Wheel Bearing - EricTheCarGuy
Well as I said in the video I shot this some time ago but never posted it.
I've been snowed in for a couple of days so I haven't been to the shop to
make some new video so I decided to bring this one up from the vault. The
idea is to give you some basic information on how to find a bad wheel
bearing, replacing it once you find it is another story but diagnosing is
the first step.
Now, another way to find out if you have a limited slip is to jack up both
sides of the car and rotate one of the drive wheels. If the wheel on the
opposite side moves in the same direction you probably have a limited slip
differential. If the wheel spins in the opposite direction you probably
have a regular differential that is not limited slip.
As I said in the video a bunch of times be careful doing this, use the
parking brake and brace the rear wheels with something. I know you'll do
the right thing.
Now on to the recommended channels
Click below and Stay Dirty
Visit me at EricTheCarGuy.com
Visit EricTheCarGuy Forum
Visit my Facebook Page:
As always stay dirty
Due to factors beyond the control of EricTheCarGuy, it cannot guarantee
against unauthorized modifications of this information, or improper use of
this information. EricTheCarGuy assumes no liability for property damage
or injury incurred as a result of any of the information contained in this
video. EricTheCarGuy recommends safe practices when working with power
tools, automotive lifts, lifting tools, jack stands, electrical equipment,
blunt instruments, chemicals, lubricants, or any other tools or equipment
seen or implied in this video. Due to factors beyond the control of
EricTheCarGuy, no information contained in this video shall create any
express or implied warranty or guarantee of any particular result. Any
injury, damage or loss that may result from improper use of these tools,
equipment, or the information contained in this video is the sole
responsibility of the user and not EricTheCarGuy.
Yamaha YZF R1 crossplane crankshaft technology explained
The crossplane or cross-plane is a crankshaft design for V8 engines with a
90° angle between the cylinder banks. The crossplane crankshaft is the
configuration used in most V8 road cars.3d model of a cross-plane
crankshaft demonstrating the 90 degree angle between the crank throws and
the large counter weights.The crossplane crankshaft has four crankpins,
each offset at 90° from the adjacent crankpins. The first and last of the
four crank pins are at 180° with respect to each other as are the second
and third, with each pair at 90° to the other, so that viewed from the end
the crankshaft forms a cross. The crankpins are therefore in two planes
crossed at 90°, hence the name crossplane. A crossplane crank may have up
to five main bearings, and usually does, as well as large balancing
weights. Crossplane V8 engines have uneven firing patterns within each
cylinder bank, producing a distinctive burble in the Exhaust note, but an even firing pattern
overall. Their second-order balance, owing to the 90° bank angle and 90°
throws, means no additional balance shaft is necessary to achieve greater
smoothness. Without the 90° bank angle, a balance shaft may be required.
The other prominent design for a V8 crankshaft is the flatplane crankshaft,
with all crankpins in the same plane and the only offset 180°. Early V8
engines, modern racing engines and some others used or use the flatplane
crankshaft, which is similar to that used in a straight four or flat-four
engine. Flatplane V8 engines may use any angle between the cylinder banks,
with 60° and 90° the most common. They lack the V8 burble and the
superior mechanical balance of the crossplane design, but do not require
the large crankshaft balancing weights. Inherent balance of the big ends is
like a straight four, and modern designs often incorporate a balance shaft
for smoothness. But without balance shafts, flatplane designs have the
least flywheel effect of any V8s, which allows them to be more
The crossplane design was first proposed in 1915, and developed by Cadillac
and Peerless, both of whom produced flatplane V8s before introducing the
crossplane design. Cadillac introduced the first crossplane in 1923, with
Peerless following in 1924.
Inline-4 engines can also use the crossplane concept. The 2009 Yamaha
YZF-R1 motorcycle uses the crossplane crankshaft and, in the absence of the
90° bank angle of the V8, must use a separate balance shaft geared off the
crankshaft to eliminate the inherent vibration (a primary rocking couple)
found in this type of crank.
A crossplane crank has been used in Yamaha's M1 MotoGP racing models in the
past. Yamaha claims advances in metal forging technologies make this a
practical consumer product.
Vespa Super 150 Cylinder Removal
In order to troubleshoot a stuck piston I started the process of removing
the cylinder head, cylinder and piston from my scooter to find the source
of the problem. Both the Cylinder and Piston looked good. I found some
metal shavings inside of the crank case which led me to realize that I had
a bigger problem at hand. I will have to take the entire motor apart to
find out where the metal shavings came from. This video only shows the
removal o the cylinder and piston.