2 STROKE WORLD .net

The 2-Stroke Garage => Turning Wrenches => Topic started by: AAAltered on February 24, 2021, 04:13:21 PM

Title: VM28 Choke....
Post by: AAAltered on February 24, 2021, 04:13:21 PM
Is there *always* a spring inside the choke plunger assembly?  I seem to be missing it on reassembly, and don't recall if it was or wasn't there when I took them apart.  The lever works properly, lifting/holding/lowering the plunger.  The exploded view shows a spring, but there are so many VM variants....

(https://i.ibb.co/dLJcbLT/3-A4495-DD-E2-E3-4-EEC-9-E76-705-A8-DD33-FC4.jpg)

(https://i.ibb.co/P5ZH9gM/9917-E339-CE3-B-47-EC-9-B2-D-C49-DE67-FDC5-D.jpg)

(https://i.ibb.co/wpF8MbR/2-B076441-441-A-4-A0-B-9944-1156010-A56-D0.jpg)
Title: Re: VM28 Choke....
Post by: m in sc on February 24, 2021, 04:18:27 PM
yes, and it needs to be there.
Title: Re: VM28 Choke....
Post by: AAAltered on March 08, 2021, 08:16:28 AM
Well I bought an Ebay VM plunger kit.  Plunger itself is the wrong length so I combined my old brass with new bits from the kit.

Given it's nice 'snap' now I suspect the spring has been missing for some time.

50's this week so I hope to get carbs back on and run the R5 for the first time since November...

(https://i.ibb.co/crmvFGP/E71-E66-DF-38-D3-4-C9-B-A495-BF5-D4162-CF10.jpg)

(https://i.ibb.co/D4bVWcw/DE3-D589-B-0688-47-C8-BD94-C2-BEA7884-B38.jpg)
Title: Re: VM28 Choke....
Post by: m in sc on March 08, 2021, 11:50:45 AM
yup. that should run well.  :clap:
Title: Re: VM28 Choke....
Post by: Striker1423 on March 08, 2021, 10:08:50 PM
Mine doesn't have a spring on my stock rd carbs. :( Never knew that one lol.
Title: Re: VM28 Choke....
Post by: m in sc on March 08, 2021, 10:18:15 PM
def should
Title: Re: VM28 Choke....
Post by: Striker1423 on March 08, 2021, 10:24:56 PM
Quote from: m in sc on March 08, 2021, 10:18:15 PM
def should

I cranked the outer spring up to put pressure on the plunger. I bet my choke circuit was leaking. Remember how you said the plugs looked really carboned up when I killed the bike?

Maybe that was one of the issues.
Title: Re: VM28 Choke....
Post by: AAAltered on March 09, 2021, 08:25:50 AM
Yep and it makes me wonder what effect I was getting from that missing spring....
Title: Re: VM28 Choke....
Post by: m in sc on March 09, 2021, 10:46:48 AM
can cause rich condition. that spring seals the rubber insert to the port. with no tension can/will leak.