4° timing advance flywheel key.

[JerryHawk250]

Originally Posted by Its_not_a_honda

Man you guys are lazy. JK. I used to do this back in the 80's. I raced go karts. 5hp briggs. When briggs went to electronic ignition, it didn't take us long to start fiddling with it. I would take some key stock and a file and make my own. THEN I figured out that the flywheel key was only to locate the flywheel. Once the nut was tightened, the key does nothing. The taper fit is what holds it in place. Once you know this, your timing is unlimited. I never ran a key again. Used a degree wheel and timing light. Just letting you guys in on racing secrets.

Yeah, I've done that myself. The key just takes the guess work out of getting the timing dead on. I'll probably just take the spare stock key from my X22R and file the offset in it and install on my Hawk. I like to have the key installed in case of a back fire the flywheel doesn't shift too far out of timing. I've had that happen before.

[OneLeggedRider]

What Jerry said.. ^^^

[OneLeggedRider]

I'm shamelessly bumping this thread back to the top like Tako does, but not for personal gain. I thought you folks would be all over this! To get that much of a performance increase for $18 and a quart of oil, and less than an hour of work?!?!

[JerryHawk250]

Originally Posted by OneLeggedRider

I'm shamelessly bumping this thread back to the top like Tako does, but not for personal gain. I thought you folks would be all over this! To get that much of a performance increase for $18 and a quart of oil, and less than an hour of work?!?!

I'm getting ready to order two. One for the Hawk and one for the future bike. Don't need to convince me. lol

[OneLeggedRider]

Originally Posted by jeffrey

What are the dementions of the stock fly wheel key length X width.

Length and width for the stock key is 14mm x 4mm and the height of the curve is 4.1mm. The offset for the 4° advance is 0.7mm

So that's simple enough, make your width 4.7mm and then cut the opposite sides halfway through the height to 0.7mm

[4x4Dragon]

+1 for Joe Henner being great to work with! Super responsive and helpful. I've got one of the flywheel keys from him but haven't put it on yet. (i have a Kayo T4) guess i'm still a little intimated in doing it though Joe did send me the link/part number for the correct flywheel puller.

[alex_in_az]

Originally Posted by 4x4Dragon

+1 for Joe Henner being great to work with! Super responsive and helpful. I've got one of the flywheel keys from him but haven't put it on yet. (i have a Kayo T4) guess i'm still a little intimated in doing it though Joe did send me the link/part number for the correct flywheel puller.

which is the correct puller? the one I have has 24mm and 27mm threads on it, but I haven't used it yet

[Goob]

Originally Posted by RedCrowRides

@TheChairman Contact Joe Henner at his facebook page, Henner motorsports, he is very responsive. he also has a YouTube channel if you want to see his videos about this advanced timing key or the Orion RXB 250 which he has also done extensive mods too, all the mods should also apply to a Brozz, etc.Cams, big bore kits, etc.

How do I find the Joe Henner Youtube channel? Sorry, I a new to Youtube and have yet to figure out how to find specific channels. I have subscribed to several (including JerryHawk250), but can never find the channels again after the first time.

[OneLeggedRider]

Originally Posted by Goob

How do I find the Joe Henner Youtube channel? Sorry, I a new to Youtube and have yet to figure out how to find specific channels. I have subscribed to several (including JerryHawk250), but can never find the channels again after the first time.

Type in Joe Henner and then subscribe.

[4x4Dragon]

Originally Posted by alex_in_az

which is the correct puller? the one I have has 24mm and 27mm threads on it, but I haven't used it yet

not sure if it's exactly the same for your bike but Joe referenced part number: 08-0425 from Motion Pro. (M28 x 1.0)

[JerryHawk250]

Originally Posted by alex_in_az

which is the correct puller? the one I have has 24mm and 27mm threads on it, but I haven't used it yet

This is the one you will need. It's the one Megadan used. https://www.ebay.com/itm/1pc-Black-M...72.m2749.l2649

[alex_in_az]

Originally Posted by JerryHawk250

This is the one you will need. It's the one Megadan used. https://www.ebay.com/itm/1pc-Black-M...72.m2749.l2649

ok, great! next question, which way should the offset key face so I don't retard the timing by 4 degrees?

[Deckard_Cain]

Just ordered my flywheel key last night! Shockingly, Joe replied via FB Messenger at like 1230 in the morning, and I was up.

2 mins to paypal some money and boom, done!

Now to get the puller or make one....

[JerryHawk250]

Originally Posted by alex_in_az

ok, great! next question, which way should the offset key face so I don't retard the timing by 4 degrees?

The engine rotates counterclockwise looking at it from the flywheel side so Offset will go to the counterclockwise side of the key.

[Deckard_Cain]

Originally Posted by 4x4Dragon

not sure if it's exactly the same for your bike but Joe referenced part number: 08-0425 from Motion Pro. (M28 x 1.0)

Originally Posted by JerryHawk250

This is the one you will need. It's the one Megadan used. https://www.ebay.com/itm/1pc-Black-M...72.m2749.l2649

Well this is conflicting ... lol.

The Motion Pro tool is M28.1.0 .... th eone Dan used, that you link here, Jerry, is described on the page as M27x1.0.

Pretty sure one won't work and the other will.

So any ideas all which is correct?