Flash II Begins

Wheelman-111 · Post by **Wheelman-111** » Thu May 14, 2009 2:11 pm

Greetings:

Yeah I wouldn't have thought of it on my own. I guess the principle is to let it set up just a bit with some thickness - finger-tight. After an hour it's pliable but no longer outright liquid so a quarter-turn or so squeezes it to its desired thickness. I suspect the final torquing will flatten it out more, but it won't disappear outright from between the contact surfaces.

Pics added above.

Wheelman-111 · Post by **Wheelman-111** » Thu May 14, 2009 11:20 pm

Greetings:

Final-torqued the head bolts to 17.5. I have no idea why I used this figure.

. It just felt right.

Everything still cleared despite base-gasketlessness and O-ringed head. Even my POS Harbor Freight drill could spin it.

Hooked up compression tester:

142 with cold cylinder and only assembly oil in the bore. Hope she holds.

All shrouded and awaiting bargain new Keihin 24mm carb for GY-6.

scooterwerx · Post by **scooterwerx** » Fri May 15, 2009 10:46 am

nice! fire this sucker up!

burnt_toast · Post by **burnt_toast** » Fri May 15, 2009 11:36 am

woohoo lookin good! its fun just looking at a just built engine all fresh and pretty

but 17.5 ftlbs for the head bolts? nuts dude.. manual recommends about 9ftlbs or so, most I've done is 10-11 on others

Wheelman-111 · Post by **Wheelman-111** » Fri May 15, 2009 12:34 pm

Greetings:

When I assembled Flash I, I followed the 9-lb. instructions against my better judgement. Despite light oil on the heads and threads, that pressure barely compressed the base gasket. And it leaked until I re-torqued later.

I decided to go by my semi-educated, ham-fisted feel. Ratcheted up the old Craftsman torque-wrench by 2 ft-lb increments from 9.5 and proceeded carefully until it felt like I was reaching the elastic limits of the bolts, evenly spaced. The point I think is to get it as tight as you can without breaking or stripping anything. Gasketlessness means a couple extra threads in the aluminum to help, too.

I want to publicly thank Scooterwerx for his incredibly fine work O-ringing my head. The scooter's I mean.

Can't fire up without incoming new Keihin GY-6 carb. I think I'll have some issues with this 4-stroke unit, particularly jetting, if it works at all. Keeping fingers crossed. If anyone's tried this, please LMK. The price was too good to pass up, there's a stock bystarter with connector, and it looks like the throttle cable's the same.

losthope · Post by **losthope** » Fri May 15, 2009 12:46 pm

i know people running 4 stroke carbs. they have seemed to work. to get it perfect you may have to get into changing to a different needle. there was some debate on how the needle wasnt sized right for a 2 stroke. though these carbs come off all different 4 strokes so it will be different carb to carb pending where the carb came from.

Wheelman-111 · Post by **Wheelman-111** » Fri May 15, 2009 12:49 pm

Greetings:

Thanks, LH! At least I now know it can be done. Keihin jets and needles can be hard to find for the stock Elite carbs, but the GY-6 may be a bit easier. I plan to break 'er in kind of easy and have temp gauge to assess as I go.

losthope · Post by **losthope** » Fri May 15, 2009 12:53 pm

motor is looking nice by the way! do you have gears yet? what ratio are you going to run? or are you just going to ripp wheelies all they way to the office?

Wheelman-111 · Post by **Wheelman-111** » Fri May 15, 2009 12:59 pm

Greetings:

I seriously considered stock gears for a second, for the reason you intimate. If I can't get the right belt for my Polini combination, I may have to... Stock belt on the way from Honda to try, and Scooter-Center agreed to send me an -006 Polini (for Derbi/Aprilia) 16.5x665 - an inch longer should do it. Dunno about the width...

I have two (2) stock gear assemblies and the 7.83:1 setup in Flash I. If anyone wants one of the spares for a bolt-on installable Malossi 67-6458 kit, LMK. I think I should have a bit more torque to pull that ratio once the belt issue's resolved.

gashead · Post by **gashead** » Sat May 16, 2009 12:04 am

Where did u find O ring, what is dia, groove width, or grove dept?
(dia of O ring)

Wheelman-111 · Post by **Wheelman-111** » Sat May 16, 2009 8:37 am

Greetings:

I'll send specs Monday
BB unable

Wheelman-111 · Post by **Wheelman-111** » Mon May 18, 2009 10:55 am

Wheelman-111 · Post by **Wheelman-111** » Tue May 19, 2009 4:24 pm

Greetings:

I decided to break in Flash II with a proven quantity - the Arreche 17.5 is correctly jetted and likely won't blow up. However I need that stock-to-CT adaptor and can't find one...

With that and my sorted-out CVT, I'll be ready to light it up next week.

Please help WHAC locate that adaptor?

Wheelman-111 · Post by **Wheelman-111** » Fri May 22, 2009 2:04 am

Greetings:

This is a 2-nighter. Pulled Flash I off. Found and plugged a finishing nail through the tire that looks like it was driven in with a hammer. (^#$*)
Disassembled and swapped 8:1s, Arreche carb with '89 reed block, LeoVinci pipe and wheel onto Flash II. Here's a peek under the shroud:

Yup, still says Polini... Dirty from battle (and an occasional under-tightened plug...

but strong as ever.

Here's a stripped Flash I waiting for a decision on its fate:

Back to 11:1 gears, needs only a reed block, carb and belt drive. Maybe a nice cleaning?

The Starboard side:

Flash II reak-in will be done with the Arreche 17.5 since its jetting is known. The high-compression Malossi will warrant close temperature monitoring until it's known safe. The CT manifold and attached Keihin await a cable mod, and so they stay in the box until after break-in. I have a feeling that carburetion won't be the limiting factor.

I finally decided to shim the front pulley by 1/32", (crushed plug washer) and the stock belt now rides the top of the rear pulley. Maybe take-offs will be less painful than they've been since the Polini vario was installed. The starter pulley engages the splines, a little. Torqued it down tight. Monday night we may have ignition.

bradthreee · Post by **bradthreee** » Fri May 22, 2009 1:12 pm

Great work Wheelman! Honda-san would be proud of your acheivements!

Honda Spree and Elite 50 Forums

Flash II Begins

Top 5 Recommendations For Wheelman's AF/05 Mod:

Pics & Proper Permatex Hygiene

Houston, We Have Compression

Torquey Bolts & Fired Up - Pics Added Above

4-Stroke Carb

O ring

Specs

Groovin' the Head

Stuck...

Flash II Assembled