jjarkys
Active Member
Was this with a full tank or low level like we discussed earlier?
Sven may be on to something with the overheating cam sensor. I've never searched for that.
General Performance Question...Feedback Please
- Thread starter awssome05
- Start date
Sven may be on to something with the overheating cam sensor. I've never searched for that.
jjarkys
Active Member
I will say though, in my situation keeping the tank full completely eliminated the problem. That's not a cam sensor. Have you tried keeping it half full or more? That's obviously not a fix but would IMO narrow it down to a venting/vacuum issue. If it fixed your problem like it did for me.
Both tanks where completely full when I started off for the 1st hour ride. No problems there then I went back out a bit later to the gas station to top them off and thats when it happened. I started it back up took it the gas station and it took less than a gallon to top it off. Im bout ready to sell this thing and be done with it.. Ive had it less than 6 mo and been working on it more than riding it.
Fibersnake
Banjo Playing PsychoBilly
When you add gas, do you do so by pulling both caps off and thus filling both tanks. Some people have had issue when they only fill through the right tank like on many HD. With the Mastiff, you need to remove both caps and fill both tanks.
The only time I have ever had an issue with stalling was way back when and it was due to vent check on right cap. Was removed and never that issue again. Normally get about 3.6 gallon before it starts to sputter and have to hit reserve. This depends also on the road (i.e when in twisties, sooner and same with climbing) due to where pick up is on left tank.
If by chance you only are filling one tank, make sure to top off both. Also check the cross connection to make sure it is not restricted.
If all this checks out, also try to loosen gas cap (carefully) when it starts acting up while riding to see if that makes a difference. If it does, back to looking what is causing the vacuum.
The only time I have ever had an issue with stalling was way back when and it was due to vent check on right cap. Was removed and never that issue again. Normally get about 3.6 gallon before it starts to sputter and have to hit reserve. This depends also on the road (i.e when in twisties, sooner and same with climbing) due to where pick up is on left tank.
If by chance you only are filling one tank, make sure to top off both. Also check the cross connection to make sure it is not restricted.
If all this checks out, also try to loosen gas cap (carefully) when it starts acting up while riding to see if that makes a difference. If it does, back to looking what is causing the vacuum.
Diesel Dan
Well-Known Member
DUDE........you think you got bad luck with your ride??? You should hear about the shit that happened to mine the INSTANT after I bought it:angry:....It literally fell apart in my shop when I got home, I was fuc*ing PISSED:angry:....BUT WITH everyone"s help and wisdom on here, I got all the issue"s resolved with my chopper:2thumbs:,and I rebuilt the whole damn thing over the winter...3 grand later
,Now it s ALMOST time to ride up here,cant wait...
Dont worry bro,we will all help ya get it goin,that is the main objective of this site..
,Now it s ALMOST time to ride up here,cant wait...Dont worry bro,we will all help ya get it goin,that is the main objective of this site..
Im gonna pull the plugs today and make sure it isnt running too rich or too lean. Also ive already pulled the check ball in the cap. How do I tell if the cap is venting properly. Im not seeing where the air is supposed to vent. At this point I may get the carb rebuilt. Dont know what else to do. Im gonna pull the petcock again and check again to make sure I didnt miss the lining.
jjarkys
Active Member
Fibersnake
Banjo Playing PsychoBilly
There is a small hole under the aforementioned check valve that allows for air to vent to the outside of the cap. Basically it allows air to vent the center of the cap to the outside edge of the cap (the part that is open to air, verse the part that is sealed on the center by the o-ring).
I would try another ride, starting with full tank, ride it normally and when it starts to fumble (if it does), while riding loosen the right cap so that the o-ring is not sealing or even take it off and see if that make a difference. If it does, will give you a good idea that it is a venting problem.
Are you filling through both tank caps? Have you checked the cross line between right and left tank to make sure no kinks?
jjarkys
Active Member
Mine were too. I rubbed a little wd40 on the cap threads. Much easier now.
Fibersnake
Banjo Playing PsychoBilly
Some people (me included) have taken some sand paper and sanded down the perimeter of the plastic threads of the cap. It will make it much more easier to get off. Just be careful not to get carried away. The old style caps tend to swell with a good part due to alcohol in gas now and days.
There is a newer cap style that came out that does not swell like the old if you can find one. Also the new cap does not have the CARB/EPA check valve on it nor threaded for such either.
So I decide to double check my work on the cap and I remove the epa plug and then take the remaining screw out so that I can make sure the vent holes are flowing properly. I blew thru the underside of the cap and it seem clogged. So I cleaned out the holes and re assembled it. Blew back thru it and wow I hear air escaping. Of course I run into a second problem I screw the cap back into the tank and when I go to remove it the chrome cap came off and left the plastic piece in the tank. Is there any problem using red or blue loc tite to keep this from happening again? Also does this bike have a external removeable fuel filter?
Fibersnake
Banjo Playing PsychoBilly
Should be no issue with the loctite, would recommend blue. Hopefully what sounds like a possible block vent that has been cleared up will take of the problems. Also try the sanding of the perimeter of the threads to hlep make it easier to remove. Keep us informed!
V
Guru
No it dern't. If some one has installed one it would be in the fuel line between the petcock and the carb and should be very visible.
I think I got this thing back togeather. Air seems to be flowing thru this thing now. I have to blow thru it with a lil force but it goes thru. Does this sound about right? If so then I just have to wait for another nice day to test it out. If I havent said it recently I really appreciate all your imputs.
Fibersnake
Banjo Playing PsychoBilly
I do not think it takes very much to work right, just a sure flow since it is only allowing it to equalize and prevent a vacuum as the fuel level goes down as well as allowing for pressure to stay safe as temp change. If in doubt you could take a small index drill and enlarge the hole on the plastic piece a little, but then it may tend to vent more fumes than idea.
Got the new cap from donna a couple of days ago. Seems to flow way way better than my old cap. Just waiting on a day over 25 Degrees out to test it out. Im thinking that may be the problem considering I couldn't blow thru the old one at all. Ill let you know here hopefully in a few days. Thanks for checking with me.