model H rebuild

[Quenton Guenther]

Hi Jim,

Might have a few facts slightly off. Rumors have CWC building the first 1948 Pacemakers for Whizzer, however others claim Whizzer actually built the first Pacemakers in house. Schwinn sued Whizzer over the frame design [cantalever]and won, the final outcome was Schwinn built all the future Whizzer frames.

There were several special bikes made by other companies for the Whizzer motor including the CWC 226, Schwinn WZ, S4, S10, and "specials", even Huffy [Huffman] made a HD bike for the Whizzer [very, very rare]. The majority of the bikes made for the Whizzer motor kit were painted Whizzer maroon and cream. Not long ago I sold Jay Cruise in PA an original 1948 Schwinn WZ/S4 with the maroon & cream paint [badly faded], The Schwinn WZ & S4 being the most common, then the Roadmaster 226, and the Huffman bikes less common.
I currently have a 1948 Roadmaster with a Whizzer "H" kit, however it isn't the valuable 226 version with the maroon paint. If I find time I plan on selling the rebuilt "H" motor and put a 1948 series "J" motor in its place to make it a "more" correct motorbike.
Hope this information helps.

Have fun,

[48 RDMSTR]

Amazing! Thanks for all the help, it seems you know all there is to know about these motorbikes! Im so happy you could help me straighten this out. With what I have gathered and from what you have told me I am certain I have a Roadmaster 226, I am very very excited to have it rippin and roarin down the road. You currently have my model H motor and are applying quite a few performance upgrades, and although I dont have a model J motor I am very pleased to learn that the bike is indeed fairly rare. I keep getting better and better news on my whizzer! Just last week you had Informed me that I had a later more valueable german made crankshaft in the Model H. I cant wait to get the motor back and mounted on my Roadmaster 226! I will definately upload some pictures when I do.

Thanks again for everything, James

[WZ507]

48 RDMSTR,

To assure you have a Roadmaster Model 226-WH you should verify the following.

The absolute deal breaker is that it has to have belt reliefs formed into the upper and lower left rear fork legs to provide extra clearance for the belt (the legs are heavily indented like a Schwinn WZ-507). If it does not have these reliefs, it is not a 226-WH. Additionally it would have wide semi-circular handlebars, a New Departure WD front brake, the Shockmaster style springer front fork, "swept" fender braces, headlight and rear carrier. Hope you have it all. Let us know.

[48 RDMSTR]

I am Happy to say my Roadmaster does have all of the features mentioned above. Its a true 226WH; it is completely original except I learned the Model J may be a more correct engine, mine is a Model H. I also have a stewart-warner whizzer speedo and a seiss light and horn combo that mount on the handle bars. I have purchused a repo High oil breather, if anyone knows where i could find an original from a 300 series or up it would be greatly appreciated. I will post pictures soon

48RDMSTR

[Quenton Guenther]

Hi 48RDMSTR,

Pictures of your modified head. I milled it .060" and reshaped the chamber. I made it as close to a Weber as possible, however the Weber combustion chamber is very shallow and had to leave a little extra in the original head to keep compression up.

Have fun,

[48 RDMSTR]

Awesome! Cant wait to see the final product! You do amazing work and I know that you are backed up with lots of work in the shop. I really appreciate everything you have done for me Quenton, thank you so much. after all the mods are done what do you think the top speed will be? very excited thanks for keeping me posted

48 RDMSTR

[Quenton Guenther]

Hi 48 RDMSTR,

Have decided to make a custom copper head gasket for your motor as the original is .030" and the custom will be .010" thick. This will help increase the compression ratio lost in the combustion chamber.

The average "H" motor will average 35 MPH [some faster motors may make it to 37 MPH].

By increasing the bore, increasing the compression ratio, porting intake & exhaust, and a larger intake valve should at least exceed 42 MPH and may exceed 45 MPH.

We [Jay Cruise & Myself] are currently working with a company to reproduce the famous "Weber" camshaft and hope to have them available within a few months. Of course your motor will be completed prior to obtaining the modified camshafts, however you can easily install the camshaft at a later date for additional power.

Have fun,

[48 RDMSTR]

Im not sure what the thickness was but I sent a copper headgasket with the motor when I shipped it to you. also I sent a repo tall oil breather. would you happen to have any origanal tall oil breathers from the 300 and up motors?

[48 RDMSTR]

I sent with the motor an original copper headgasket. I also sent a repo tall oil breather, I was wondering if you would happen to have an original tall oil breather from the 300 and up series motors. I dont want to have any repo parts on the bike but I am going to be running 8 oz of oil. I have kept the oil breather that came with the motor aswell

[Quenton Guenther]

Hi 48 RDMSTR,

Sorry I don't have any extra tall breathers, however I can polish the repo you have to appear closer to original. The head gasket you sent is .030" thick and will be replaced with the thinner custom version to raise the compression ratio.

I will be working on aligning the crankshaft later today. I have a special vintage lightweight piston I hope to fit into your cylinder, many refer to the piston as a "racing" piston. It is very rare and looks more like a modern day Chevy piston.

Have fun,