timing

[hawk363]

anyone ever use the vitos timing keys?

[Sprntr81]

I WOULD RECOMMEND AN ADJUSTABLE STATOR,I MYSELF HAVE SEEN NUMEROUS "DEGREE KEYS" SHEAR OFF.i SAY IF YOUR GONNA PULL THE FLYWHEEL OFF AND MESS WITH YOUR TIMING,DO IT RIGHT AND GET THE STATOR PLATE.

[jbooker82]

Here is a common problem with the off set keys.

Vitos +4 deg timing key LINK

 

Read that and see if you still want to use one. The best way to do it is to get a 35 dollar stator plate. It is fully adjustable from -10 deg to +10 deg.

Ricky Stator Plate LINK

[hawk363]

alright thanks guys good stuff to know

[Truckracer]

I'm using the Vito's key with no problems.

 

The key (stock or offset) locates the flyweel on the crank and provides some but not all the strength necessary to prevent the flywheel from spinning on the crank. The taper fit is the majority of the strength, proper torque of the retaining nut is the deal here.

 

Key's are more accurate than the plates. You set a plate at 4 and unless you check it might be 3 or 5 or 4.5...

[sheefreak]

I'm using the Vito's key with no problems.

 

The key (stock or offset) locates the flyweel on the crank and provides some but not all the strength necessary to prevent the flywheel from spinning on the crank. The taper fit is the majority of the strength, proper torque of the retaining nut is the deal here.

 

Key's are more accurate than the plates. You set a plate at 4 and unless you check it might be 3 or 5 or 4.5...

 

I disagee. I bet there is just as much varience for a $20 part in the machining. I would go w/the plate. Besides, what if you want to change the timing?

[Truckracer]

I disagee. I bet there is just as much varience for a $20 part in the machining. I would go w/the plate. Besides, what if you want to change the timing?

 

Go ahead and disagree. As a former machinist I can tell you all machined parts have machining tolerances built-in to the manufacturing process. Those offset keys can be made with two cuts on a mill. The plates on the other hand have many steps to go thru from the plate itself to the etching of the timing marks to the drilling of the mounting holes, all the tolerances add up to inaccuracy of the final timing. Someone will say, "They are made on CNC equipment" sure they are, but no machined part is perfect and CNC machines just insure greater accuracy for mass produced parts.

I'll take a key.

[csrmel]

in all honesty the timing key is only there to hold the flywheel from spinning while the bolt is being tightend. once its tight the tapre of the crank is what holds the flywheel in place.

 

if you look at those racing briggs and stratton gocarts people have, alot of those guys dont run flywheel keys at all because they need to change the timing by having the flywheel in a different location and somtimes a magneto relocator isnt allowed.

 

not only that, but most flywheel keys are made of a soft metal and designed to break incase you lock a motor up so the crank dont twist or break. flywheel is a heavy device and can do some damage if it tries to decelerate too quickly.

 

with all that said, i chose to slot the stock timing plate instead of buying a new plate or key. all ya need is a drill press, hand grinder, a rat tail file and some paitence.

[jbooker82]

Key's are more accurate than the plates. You set a plate at 4 and unless you check it might be 3 or 5 or 4.5...

 

How is that any different than if your stock stator plate comes loose? Sure it isnt slotted like an adjustable plate but it can still move around if loose.

 

I run a Prodesign Stator Plate. It is 100 bucks but it is CNC Billit aluminum.

[Truckracer]

How is that any different than if your stock stator plate comes loose? Sure it isnt slotted like an adjustable plate but it can still move around if loose.

 

I run a Prodesign Stator Plate. It is 100 bucks but it is CNC Billit aluminum.

 

If the stator plate comes loose you have big problems, and how is this related to key vs plate dissussion?

The Pro-design is a nice piece and if you need to be able to adjust the timing from a standard 3, 4, or 7 degrees keys provide then by all means use it. I would check the actual timing vs the etched numbers on the plate though.

 

Now if your flywheel key is off on its tolerances it can cause the shearing of the key and also possible engine damage, gouging of the crank end or even throw the crank out of phase and balance which could be catastrophic to the crank.

Wow, if a key was that far off the flywheel wouldn't sit straight on the crank and would wobble and vibrate like hell.

Damn, thats a scare tatic if I ever read one...LOL

 

You do know the key (stock or offset) just locates the flywheel when its installed, it does not hold the flywheel in position.

[sheefreak]

Key it up truckracer! I guess we'll just have to agree to disagree!