|
|
Post by sweden on Aug 20, 2010 12:04:12 GMT -5
Still suffering my bogging at full throttle and having to decrease throttle to keep scooter going, here is a list of what I have done so far: Installed a new air filter and air intake pipe and played with the AF adjustment...still the same. Adjusted the valves and played with the AF adjustment, still the same. Adjusted the valves a second time...guess what? Still the same Removed the carb, stripped it, cleaned it as per the Big Guys Carb cleaning video (great video, I learnt alot there) replaced it, got it started, took it out and warmed it up and tried the AF adjustments and the bogging was still there. Checked petcock....works just fine. Checked fuel filter foe cleansliness  Removed carb and checked small holes by butterfly in carb for flow and they are fine. Where should I look next? I am kind of at the end of my tether now and really want to sort this out. The one thing I noticed in the carb is that the diaphragm doesn't sit tight like in the big guys video, it just lifts straight out, could this be my problem? I am a bit reserved on splashing out more money unless I know I am going to sort this now. Thanks for your responses, I listen to them all and try them all.  I just can't wait for the one that works. ;D |
|
|
|
Post by ziao on Aug 20, 2010 12:26:18 GMT -5
My roomates scooter (peace sport 50) was doing the samething... Turns out that he took out a little tube from the airbox because he thought it was a restrictor, without this pipe the scooter bogs down and you have to give it half throttle to accel.
Once I reinstalled it the scooter accels to about 45mph like a dream. If you still have stock airbox I'd check that out.
My dads scooter was also doing the bog down, adjusting his idle lower fixed it for him. Srry if this doesnt help, thought it was worth mentioning, right right.
|
|
|
|
Post by erictheviking666 on Aug 20, 2010 12:49:28 GMT -5
I noticed you say you installed a new air filter. Was this a Uni type high performance filter, or a stock replacement? If it was a Uni type then if you didn't re-jet your running way too lean. That's what your describing, that it's cutting out at full throttle but running better when you back off a little. You need to go up about 5 jet sizes and see how it runs after that.
|
|
|
|
Post by sweden on Aug 20, 2010 13:45:31 GMT -5
I re-installed the stock filter so that isn't the problem. The tube I think you are talking about ziao runs from the airbox to a port on the exhaust right? If that is the case, that port on the exhaust was removed by the previous owner and welded, probably thought the same thing as your room mate, seeing as I can't reconnect that, I will try blocking the hole on top of the air box and see if that makes a difference. I wish this thing hadn't been messed about with before I bought it. Thanks for the answers guys. Have a good weekend.
If anyone else thinks of something I should look at, please let me know. Cheers.
|
|
|
|
Post by erictheviking666 on Aug 20, 2010 14:27:48 GMT -5
I still say it is running lean. You can't go wrong with a bigger jet. If it turns out to be too rich you can always take a restriction out to lean the motor back out. The tube he's talking about is a little restrictor tube in the air filter box that slightly restricts airflow. If this is not there again you are running lean. If you're running lean you should be able to hold your hand over the air intake tube whiles it's running, and rev it up. If it runs better when you partially block the airflow then it's to lean. Thats a quick easy way to tell, if not your hand try a piece of duct tape and block off half of the air intake tube. If it bogs less at full throttle then you know you are running too lean. Simple easy test! |
|
|
|
Post by sweden on Aug 20, 2010 15:35:05 GMT -5
Are we talking the air pipe that runs from the exhaust to the top of the air filter box? I was under the impression that this only helped with cold starting.....correct me if I am wrong.......the guy at the scoot shop didn't think that would be my problem, I shalll block it off tomorrow anyway, like you say an easy test and it kinda makes sense to reduce airflow there.
Any scandanavian blood in you erictheviking666?
|
|
|
|
Post by erictheviking666 on Aug 20, 2010 15:48:57 GMT -5
No not that pipe, this is inside your airbox if it's even there. Unfortunately I can't find a pics of this part.
My family was from Germany on my Dad's side and Sweden on my Mom's side. ;D
|
|
|
|
Post by mdog on Aug 20, 2010 15:52:54 GMT -5
There is one place you didn't mention looking, I had the same problem, went through everything like you did. I finally took the drive belt cover off and removed the variator. It turns out a roller weight had a flat spot and got stuck which did not allow the variator to work properly, Replaced all the rollers and carefully re-assembled the pulley. The bog, slow acceleration and difficulty hitting top speed were fixed. The scooter ran great with the new rollers.
|
|
|
|
Post by ziao on Aug 20, 2010 16:48:57 GMT -5
Run it around the block without the air box attached to the carb and see if it helps, my scooter hates my air box and it runs a lot better without it, If it helps then get a free flow filter to replace the air box.
Good luck to you.
|
|
|
|
Post by mdog on Aug 20, 2010 16:56:24 GMT -5
Another note, i do agree with "erictheviking666" that it could be an issue with the air box if it is missing the silencer / restrictor tube, I removed it on my scooter which is an E-Ton, and ended up re-installing it due to drive ability issues also. if this is the case and it is missing, going to a bigger jet will help.
|
|
|
|
Post by meitianman on Aug 20, 2010 22:56:09 GMT -5
i dont see the fuel filter in that list of things you have checked. they are cheap and if you even suspect there is a possibility of it restricting your fuel flow a brigs lawn tractor filter will work and cost about 3 bucks. also when you had the carb open did you check the float level? basically when you hold the carb upside down the float should sit level if your doing it by eye.
if your run wot will be ok for a few seconds then bog down or does it bog soon as you open the throttle? if it will run wot for a few seconds then start to bog it would indicate a fuel flow issue to me anyway.
|
|
|
|
Post by sweden on Aug 21, 2010 1:53:08 GMT -5
OK, when I run the scooter, it pretty much bogs down as soon as I try to hold the throttle wide open, there is a halfway mark where I can hold it and it runs just fine, this changes if I hit a speed bump and then it bogs for a second or so. I did check the fuel filter and amended my previous post to reflect that. Can someone point out that little restrictor pipe on this diagram of my air box so I can check that.  I shall pick up a new fuel filter today, can't hurt to have a new one anyway. Can't do any work today as we are off to the country to celebrate our wedding anniversary. Have a great weekend folks and thanks for the suggestions, loads more to try and add to my list!  |
|
|
|
Post by erictheviking666 on Aug 21, 2010 11:50:30 GMT -5
That pipe is not shown in that illustration.
|
|
|
|
Post by meitianman on Aug 21, 2010 12:03:29 GMT -5
mine would bog when i hit bumps or run wot for very long, the float was set to low. raised it a bit and that issue went away. just a thought
|
|
|
|
Post by Beachy on Aug 21, 2010 22:19:45 GMT -5
Swede, another simple thing to check is your carb slide. If it's sticking it could cause the problems you are describing. Stick your finger into the air intake side of the carb and lift the slide, it should spring back down on it's own freely. If not, take off the top of the carb and check the diaphragm for tears or holes.
Edit: I just reread your post and you mentioned the diaphragm didn't seem right. When you re-install it you need to line up the small tab and then gently run your finger around the edge to get it to sit properly.
Hej do, Mike
|
|
|
|
Post by als01seville on Aug 21, 2010 22:23:30 GMT -5
If you hit a bump and it bogs it has to be your Float that is shutting off the fuel flow into the Carb Bowl to soon and not really filling it up to where it should be. I bet you can duplicate the problem just by moving the carb up and down a little.
Alleyoop
|
|
|
|
Post by sweden on Aug 23, 2010 0:29:42 GMT -5
Beachy. I have the tab lined up right on the diaphragm it just doesn't sit in their tightly, maybe I should but a new diaphragm and needle?
als01seville. How do I adjust the float level? This would seem to make sense as if it isn't filling up right, then obviously there wouldn't be enough fuel in the float to match the demand and then cut out until I decrease revs and start again.
Eric, that pic shows my complete air box so maybe it doesn't have that pipe in there anyway?
Thanks everyone that has replied, it really is appreciated.
|
|
|
|
Post by sweden on Aug 23, 2010 8:13:55 GMT -5
When searching through here I can only find something that says you can't set float level on plastic floats, is that right?
|
|
|
|
Post by Beachy on Aug 23, 2010 13:52:30 GMT -5
You should have a metal tab on the float, which engages the float pin. With the float installed, turn the carb upside down. The bottom of the float (which will be on top) should be approx level with the venturi.
You could also measure from the base of the float bowl mating surface, it should be 18mm +/- 1mm.
If not carefully bend the metal tab until it is correct.
Someone please correct me on those measurements if I am wrong.
Hej Do
|
|
|
|
Post by sweden on Aug 24, 2010 0:27:08 GMT -5
Tack ska du har (Thanks shall you have) Beachy.
I think my carb has been messed around with so much by the previous owner, the diaphragm doesn't sit tight, there is no spring on the float, it just seems to flop about in there and when I watch the Big Guys carb cleaning video the float is on a spring, so I think I am going to buy a new carb and be safe in the knowledge that just some guy across the other side of the world has had his hands on it, not some little "oik" from an island off the west coast of Sweden.
I hope this will sort all my bogging problems.
Har det så bra (Have it so good.....funny these swedish expressions aren't they!)
Hej Då.
|
|
|
|
Post by erictheviking666 on Aug 24, 2010 0:32:33 GMT -5
I believe that's what I would do myself. A new carb is not that much and at least you'll know it's right.
|
|
|
|
Post by als01seville on Aug 24, 2010 1:20:28 GMT -5
Beachy,
You are correct on the float setting.
Alleyoop
|
|
|
|
Post by sweden on Aug 24, 2010 3:02:51 GMT -5
I believe that's what I would do myself. A new carb is not that much and at least you'll know it's right. Let's hope that this nips the whole problem in the bud! |
|
I just can't wait for the one that works. ;D
