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Moped Riders Association • View topic - Express SR Bystarter

Express SR Bystarter

A place within the MRA for scooter enthusiasts to exchange information.

Moderators: ItsLookingUp, pehuskey, Tab, mountainmoped, JD, John

Express SR Bystarter

Postby Sean L. » Sat Jul 26, 2008 2:00 am

You do not have the required permissions to view the files attached to this post.
Current Scoot:

'81 Honda Express SR

Mopeds Previously Owned:

'77 Puch Maxi
'78 Puch Maxi
'85 Puch Maxi
'76 Sparta Buddy
'77 Sparta Buddy
'81 Murray
'78 Motobecane
'77 Garelli Rally Sport
'85 Kamasura
Sean L.
Net Rider
 
Posts: 64
Joined: Sun Jul 20, 2008 7:12 pm
Location: Tucson, AZ

Bystarter Solution

Postby Sean L. » Sun Jul 27, 2008 10:26 pm

Ingredients:

- 1.5" of 5/8" ID fuel hose
- 1 cylindrical shaving of filter foam from a generic Briggs & Stratton filter (bought mine at ACE Hardware), 1" long and shaved to fit into a 5/8" ID fuel hose
- 1 universal vacuum adapter from AutoZone (Vacu-Tite! #47309)
- 2 Zip-Ties or Zebra clamps

Procedure:

1. Cut the narrow center section out of the vacuum fitting, leaving only the ends.

2. Clip the ends to the second barb fitting in, unless your vehicle has larger/smaller hoses. Measure your bystarter connection hoses and trim accordingly.

3. Take a paperclip or a piece of small, solid-core wire and make a little hook on the end. Use the hook to draw the foam tube into the length of fuel line. Pull the foam instead of pushing it in order to prevent bunching and increased airflow restriction. Center the foam in the line to leave room to install the vacuum fittings.

4. Gently press a vacuum fitting into each end of the fuel line, barb ends facing out. Use the Zip-Ties or Zebra clamps to secure the 5/8" fuel hose to the vacuum barbs.

5. Connect the #3 line to one end of the filter assembly and the #4 hose to the other. Secure using the Honda wire clamps or another small-gage clamp or Zip-Ties.

6. Install and test-ride.

I found this device did affect the warm up time of the bike, making it noticably shorter. I don't know what the original cycle of the factory bystarter is, but this did decrease the warm-up time on my NX50M from over a minute to 30 seconds or less. Best part is, I have no wayward hoses flailing about now!
You do not have the required permissions to view the files attached to this post.
Current Scoot:

'81 Honda Express SR

Mopeds Previously Owned:

'77 Puch Maxi
'78 Puch Maxi
'85 Puch Maxi
'76 Sparta Buddy
'77 Sparta Buddy
'81 Murray
'78 Motobecane
'77 Garelli Rally Sport
'85 Kamasura
Sean L.
Net Rider
 
Posts: 64
Joined: Sun Jul 20, 2008 7:12 pm
Location: Tucson, AZ

Bystarter Solution Installed

Postby Sean L. » Sun Jul 27, 2008 10:33 pm

Here's the improv bystarter filter as installed on the bike. The #4 line exits the carburetor at the black plastic fitting just ahead of the throttle valve and plugs into the fore end of the filter. The #3 hose plugs into the aft end of the filter and loops around to head up to the automatic choke assembly. I had the Briggs filter handy , as I'd just made a new filter for a gas leafblower and had extra foam. The Zip-Ties were a prepaid item too, but I'd bet that this thing could be fabricated for about $7 if you shop smart.
You do not have the required permissions to view the files attached to this post.
Current Scoot:

'81 Honda Express SR

Mopeds Previously Owned:

'77 Puch Maxi
'78 Puch Maxi
'85 Puch Maxi
'76 Sparta Buddy
'77 Sparta Buddy
'81 Murray
'78 Motobecane
'77 Garelli Rally Sport
'85 Kamasura
Sean L.
Net Rider
 
Posts: 64
Joined: Sun Jul 20, 2008 7:12 pm
Location: Tucson, AZ

re: Express SR Bystarter

Postby silverfox » Mon Jul 28, 2008 11:48 am

silverfox
Net Rider
 
Posts: 619
Joined: Tue Mar 22, 2005 1:15 pm
Location: San Francisco Peninsula

re: Express SR Bystarter

Postby Sean L. » Mon Jul 28, 2008 3:10 pm

Current Scoot:

'81 Honda Express SR

Mopeds Previously Owned:

'77 Puch Maxi
'78 Puch Maxi
'85 Puch Maxi
'76 Sparta Buddy
'77 Sparta Buddy
'81 Murray
'78 Motobecane
'77 Garelli Rally Sport
'85 Kamasura
Sean L.
Net Rider
 
Posts: 64
Joined: Sun Jul 20, 2008 7:12 pm
Location: Tucson, AZ

re: Express SR Bystarter

Postby Sean L. » Tue Oct 21, 2008 10:02 pm

Update:

Pulled the covers this weekend to get the VIN's for the MVD and found that the bystarter had worked loose and wasn't touching the head. Pulled the unit off and cleaned it out. Had to fabricate a replacement sealing washer between the bimetal spring housing and the valve assembly; sanding fiber washers is tricky! Reassembled the bystarter and polished the mating surfaces for the bystarter and the head. Gonna reinstall now with a bit of PC heatsink compound, Here's to hoping for improved functionality!
Current Scoot:

'81 Honda Express SR

Mopeds Previously Owned:

'77 Puch Maxi
'78 Puch Maxi
'85 Puch Maxi
'76 Sparta Buddy
'77 Sparta Buddy
'81 Murray
'78 Motobecane
'77 Garelli Rally Sport
'85 Kamasura
Sean L.
Net Rider
 
Posts: 64
Joined: Sun Jul 20, 2008 7:12 pm
Location: Tucson, AZ

re: Express SR Bystarter

Postby Sean L. » Wed Oct 22, 2008 11:40 pm

It works! Doesn't warm up as quickly as my CH80, but I'm a lot happier with it. Now all I need to do is finish goofing around with the MVD and prep it to run the Tucson Scooter Rally...

Current Scoot:

'81 Honda Express SR

Mopeds Previously Owned:

'77 Puch Maxi
'78 Puch Maxi
'85 Puch Maxi
'76 Sparta Buddy
'77 Sparta Buddy
'81 Murray
'78 Motobecane
'77 Garelli Rally Sport
'85 Kamasura
Sean L.
Net Rider
 
Posts: 64
Joined: Sun Jul 20, 2008 7:12 pm
Location: Tucson, AZ


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