Briggs based Model 08 Racer Project

I have my old original Model 08 Racer that I had built in about 2006, long before anyone would have a category for it. We used to put them either in Vintage bikes, or Whizzer!
This bike has been driven by a 2005 NE5 and also a 49cc HuaSheng with Q-matic. I am now wanting to do a Briggs project, with a twist! Among the parts I have available are.

ENGINES

2hp upright Briggs, runs good, points model I think

3hp upright briggs, (8 cu in) ran good when parked, seems to have stuck intake valve, good spark, Magnetron Ignition setup.

3.5 hp (9 cu in) upright Briggs, ran good when parked, good compression, no spark, points model

Other unknown upright Briggs, (8 or 9cu in) ran good when parked.

ALL have the flap-type integrated tank carburetor.

I do have a few carb choices, but I'd like to hear what others are using on the venerable Briggs and Stratton, Made in USA powerplant

The drive will either be Pacesetter with chain rear, or Pacesetter with belt rear depending upon the wheels, and a Whim.

Color is pre-selected, and will be a "Barn Bike build, with added rust (are they still calling that carp "Patina"?).

WHEELS

I have Worksman, Husky, and my current favorite CT-90 wheels, tho I am in the mood for some 18" motorcycle wheels.

OK guys, some ideas here?

Mike

Awww thanks Butchl, I really want to solve some of my concerns with the faster type of Motor bicycle. One of my concerns has always been the thin tires and weak brakes of MotorBicycle.

This time I want to embrace either Moped, or real Motorcycle tires and brakes, with an "Honest to Saint Peter" American Engine, the mistreated Briggs and Stratton Upright Stationary.

I am looking forward to a fun, solid bike, the Chassis (which I need to dig up pics) is a good solid Droploop, it was the prototype for the whole Racer line. It's been chopped 3 times, and bears some scars, BUT I am sure many of the Privateers bikes would have shown similar battle scars.


Mike

Hi all, yeah speed, well CA law is 30 mph, so I guess I will need to go easy on the throttle? I've been home sick today reading VERY much on wheels, tires, and a bit on the Briggs, so here is my (right as of now) plan.
I found a pic of the bike, from 2007, when it was just back from being chopped again (neck angle/rake problem). New tank, new rake, new BAD attitude.
ENGINE
I think I can pull the Magnetron out of the 3hp with stuck valve, and put in in the 3.5?
I will clean the paint off of the crankcase, because AM's almost always had Aluminum crankcases. Fins black, if possible head bare alum.
Clean up the ports a bit, larger carb, Tuned Straight Pipe (probably Whizzer style flex pipe with tip). I figger, that with a little porting, free-flow air cleaner on bigger carb, and the pipe I should pick up .5 hp easy. I am not looking to race this bike, so 4 hp should be respectable.

What else might I NEED to do to get reasonable performance?

CARBURETOR
Still completely up in the air on this one, I will use spring-back rotary throttle handle, NOT Vintage Whizzer Lawnmower type cables, BUT what carb to use?
Ideas anyone?

WHEELS
I really want a vintage looking tread pattern, whether similar to CT-90, or Triumph Flat track, or early Dual-sport, but certainly NOT Avon style. I really think I can use a motorcycle front, if I can find the right one, but I believe the rear would need to be laced. The booger in the whole deal, is the need for the rear freewheel, so I can truly maintain the pedals, and the easiest way I see is the Moped Hub. I have 2 rear Harley Davidson hubs, no drive sprocket mounts. I can belt drive, or chain drive, I prefer belts. I do already have both clutches around here somewhere.

Hi Curtisfox, I have heard the stuck valve is probably a real easy fix, but are the head gaskets re-useable? The reason the white engine (with points) is attractive to me is it is 9cu in, 3.5 hp, and I was thinking, seeing that the bike is heavy, and I am 300+ that I might have a use for the extra hp. The Gray engine (with Magnetron) is 8cu in, 3.0 hp.

Mike

Hi I will use EZMotorbike Q-matic drive on mine, I know them well, and they work for me. Sorry this is so late, had E-Mail and health issues since the start of this thread. Am currently assembling 1953 Schwinn B-4 with 1947 H Motor.

Mike