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Display Mesage #132563
Re: vacuum piston not functioning
Written by neerajverma132 on 6/24/2016 at 03:26 pm
Cash on the spot would be fine. I will see you there on Saturday or Sunday. I am traveling with another rider on a BMW bike.
Message Thread for message #132563
| jdoyle_53 6/25/2012, 01:58 am | vacuum piston not functioning Can someone point me to a discussion or link describing the workings of the carburetor vacuum piston on a PC800? My left carb piston doesn't move ? right carb seems OK even after swapping diaphragms between sides. I left gas in it last winter |
 | mikeyb_houtex 6/25/2012, 05:03 am | vacuum piston not functioning Well, it's really quite elegant, and actually somewhat simple. First, though, lemme say that I find it quite interesting that you say the engine is running correctly AND the left carb's piston doesn't move. These two 'facts' simply cannot |
| wynndungey 6/25/2012, 08:07 am | vacuum piston not functioning It could idle OK under those circumstances. (Or run weakly on one cylinder.) --- In ipcrc@yahoogroups.com, "mikeyb_houte |
| skyeenter 6/26/2012, 05:12 am | vacuum piston not functioning Mikeyb, very well done on the fuel/carb explanation. Thx. skye --- In ipcrc@yahoogroups.com, "mikeyb_houtex" |
| jdoyle_53 6/26/2012, 05:14 pm | vacuum piston not functioning Thanks Mike and “wynndungey” for your responses. I will try the atmosphere air test this weekend, weather permitting – I tinker under a shade tree. A bit of introspection: I have only observed the vacuum pistons at idle – too timid to cra |
| mikeyb_houtex 4/26/2013, 12:00 am | Re: vacuum piston not functioning Just updating the link, as the one shown below is now wrong. Correct link is this:http://www.pc800shopmanual.org/PC800SMPage5-8.htmlTha |
| neerajverma132 6/21/2016, 11:07 am | Re: vacuum piston not functioning Sorry to resurrect a dead thread but my bike was missing or slightly muffled popping sound when coasting approximately 1/4 throttle. I don't notice this noise at idle or high RPM. New plugs didn't help either. So I opened up |
| Mac Hancock 6/21/2016, 12:45 pm | Re: PC800: Re: vacuum piston not functioning |
| Dockstader, David R (Jefferson) 6/22/2016, 10:43 am | Re: vacuum piston not functioning #ygrps-yiv-1442729367 P {margin-top:0;margin-bottom:0;} |
| neerajverma132 6/24/2016, 10:53 am | Re: vacuum piston not functioning I balanced the carbs with the airbox on the bike and the popping noise is gone! However I still think the bike is running a little rich due to spark plugs being a bit on the gray side. I will be going to the deals Gap / Smoky Mt trip. I would appreci |
| neerajverma132 6/24/2016, 10:54 am | Re: vacuum piston not functioning I meant to say running a bit lean. |
| robert_a_carr 6/24/2016, 02:43 pm | Re: vacuum piston not functioning I'd be interested in the risers. You had them installed, and all the cables reached, right? I'll be at Bryson City next month. I can PayPal now, or give you cash then. your choice. Bob CarrStem NC |
| neerajverma132 6/24/2016, 03:23 pm | Re: vacuum piston not functioning They are brand new still in shrink wrap packaging from manufacturer. There are many websites with install instructions specific to the PC800. Below is a very good one from Mr. |
| neerajverma132 6/24/2016, 03:26 pm | Re: vacuum piston not functioning Cash on the spot would be fine. I will see you there on Saturday or Sunday. I am traveling with another rider on |
| sr139fox 6/25/2016, 05:15 pm | Re: vacuum piston not functioning Bob. I have one inch risers. All cables fit. Key is now in a deep socket. Take some tools and install in the parking lot. There is plenty of help and experience there. Dave P |