made2care

WOW!! This very topic caused some ruffled feathers back in 09. Found this written by Skydoc. When a brother VentureRider.Org member starts a thread asking for help with their bike, I have NEVER refused them ANY information I have on the few subjects that I have knowledge about. As it was for me when I first joined this group. A portion of the members took a liken' to me and shared the information they had, walked me thru the fixes, and shared in the pride of knowing that between the two (or more) of us we were able to repair my bike or upgrade an issue that was causing me trouble. For anyone who thinks that their 98 horse power MOTORCYCLE isn't putting enough hydro-carbons out of the tailpipes to kill off more than a few trees, or their car or truck for that matter, should live in a state where they "smog check" every vehicle, then you would get an idea just how bad vehicle pollution is. I'm sure we ALL do our fair share of destroying the ozone with the vehicles we drive/ride, the places we work, the trash we throw away, etc. This old saying comes to mind, and it goes like this: "People that live in glass houses, shouldn't throw stones!" So unless you live in a mud hut, WALK everywhere you go, wear animal skins for clothes, and of course NEVER ride your motorcycle anywhere, perhaps you might consider confining your "politically correct" comments to some other forum and leave the repair and upgrading of motorcycles to the people who are interested in repairing and upgrading their motorcycles! I apologize to Ken for hijacking this thread, after all the man said he had a problem with his bike, I had the same problem and told him what I did to fix it, Isn't that what we are all here for? If I wanted to "hug trees" I'd join the Sierra Club.org, not VentureRider.Org. My name is Earl Harrell (skydoc_17) and that's how I feel about this subject. Interesting! I couldn't find any pics of skydocs mod though.

okay, thanks for the info

I just found this: "For those of you with early Ventures that had the air box drain hose that went to the ground, Yamaha did a design change and issued a tech bulletin. Basically to tee the drain hose back into the breather hose so that oil could eventually drip back down the breather to the crankcase. Here is the fix... The bulletin its M84-017 issued 4/6/84. On the breather hose from crankcase to air box, cut the hose 35 mm from the crankcase end. Install a tee fitting Yamaha part # 90413-12017-00 between the 35 mm hose and the remaining breather hose, and use 2 clips Yamaha part #90467-14015-00. Shorten your air box drain hose to 360 mm, by cutting off the bottom end and discarding the inline filter., Reuse one of the clips from your inline filter on the drain hose to install it into the tee you installed on the breather hose."

Okay, Can anyone clarify the crankcase breather mod? I'm thinking the setup I have is not helping my gas mileage. Here is my setup which the po did. Both holes capped on airbox. A clear tube running from crankase with a small air filter on end of tube. This tube runs into the cowling on right side where it is not getting much air since the air vent (one facing forward) is blocked off with cardboard. I read somewhere that skydoc had a kit for this. Any thoughts on this and should the little filter at end be exposed to outside to get sufficient air to breath?

What should my gas mileage be? I get around town would be less but what about highway mileage?

Okay,, I think everything is tweaked nicely now. Bike running way smoother and way faster!!! I also leaned her out a bit and much better . Went for numerous rides today and all went well! Now, time to resurface windshield.

will do. wow! carbs were out of wac! they are synced now. will still read pdf

Okay, now, the pilot screws should be 2 turns out from lightly seated , correct? and if its running too rich, do i turn all the pilot screws in 1/4 turn to lean her out.

Is this the air/fuel mixture screw? Where my little screwdriver points back in the hole is a little brass screw. I'm trying to sync and turning the screws does not change the dials on my sync tool.

Something to report! I took the bike out yesterday and we had high winds around 20-30 mph. This was my first experience riding this bike in high winds. As big and as heavy as she is, I was bullied around pretty easily by the wind. Now it could be that i am not used to the bike but i was just surprised at how easily she swayed. thoughts?

Will do, thanx

Okay, now that I have the bike running and not stalling on me, I have a couple more issues to address: 1st the gas tank gauge. I have seen the bars a few times but then they disappear. How do I fix that? the 2nd issue has already been answered and I just have to find the time to tweak, bike is running rich.

she rode really well today

Okay, thanx for the info.

Guys, I took the bike out today after work for my longest ride yet and no issues. It had to be the carbs not seated all the way causing a vacuum leak. My spirit is once again invigorated !!

So..........The 2 ports on bottom of air filter box. Rear is capped and little one in front is open. Just leave alone, cap both, since the port on crankcase already has the hose with filter on the end.

Well, it looks like the PO has a vent tube of sorts coming from engine by twinkie ( i'm assuming this is whats supposed to connect to airbox. The tube carries over into the fairing and has a little k/n air filter on the end.

Quick question. When I removed the airbox I noticed 2 ports on the underside of it. One opening was capped off , the one to the rear and then the little port in the front left had no hose connected. Also, How does the airbox get any air if the false tank covers it? I also have the side covers with aftermarket chrome which could restrict airflow somehow, maybe not. When I rode it today , I left off the false tank cover and side panels. Seems to get more air.

Well........ noticed she is idling much better after I seated the carbs all the way. Took her out for a good ride and no issues, rode strong!! Carbs might have been the issue after all! At least I didn't get stranded today. Will keep u posted. thanks

Okay, shoot , might not be anything but my carbs where no seated worth anything. I managed to get them in all the way nice and snug and tightened up. Will see what happens! At least one thing is eliminated now.

Yes, I'm going to fix that today, then see what happens. Thank you

After some research, here is what could be the problem(s): coil going bad cdi going bad vacuum leak bad fuel cap gas tank vent tube plugged carbs if u want to validate or add to the list, please do. Interesting how it gives me trouble only after the engine warms up!

Just went out to start up bike. No problems, fires right up and idles perfect. I made no adjustments since it stranded. Could something be happening after the engine heats up to cause it to stall? here are some more things I have noticed, just before it stalls and I give it gas , there is a sucking sound coming from what appears to be the carbs. It's not a backfire just a missing. Also, I just now noticed the carbs aren't seated all the way inside boots so maybe that is causing a vacuum leak. Too many variables here and there is no way I can go on a trip this summer until this is resolved! I see one ribbed line on the bottom of carbs which I think should be further down in boot manifold.

Well, I got stranded again. Something is not right . I checked the plugs and they are dry black sooted , so I'm assuming she is still running rich. Would fouled plugs cause engine to stall. Has brand new fuel filter and tank is clean, no rust. Maybe I can go with a hotter plug? coils are good but might upgrade. Any thoughts or help is much appreciated! Thanks

Took her up to 110mph and could have kept climbing! Scary! I also don't think my carbs are seated all the way. will have to figure that out but..................she running smooth.