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View Full Version : Scooter Bogs on Full Throttle - Where to Service?


The End
25th October 2014, 16:16
Hi,

Recently purchased a second hand 50cc Yamaha Jog CV50 (2 stroke) which has done around 11,000kms.

After cleaning the air filter and putting it back in, the scooter now bogs down when applying full throttle.

At around 30km/h if I hold the throttle wide open to accelerate further, the scooter will hesitate and bog down. If, from a complete stand still or slow speed I gently roll on the throttle, then there are no issues and it will get to about 55km/h with no issues. Incidentally, it was working fine for 30 mins or so then started happening out of no where.

What could be causing this? It seemed to work fine prior to cleaning the air filter, although I only have about 1 hour of riding before touching the air filter to compare to now.

Also where is somewhere that I can get it serviced that isn't going to cost an arm and a leg?

Cheers
nzspokes
25th October 2014, 16:26
What did you clean the air filter with?
The End
25th October 2014, 16:34
What did you clean the air filter with?

Warm water with soap. Rinsed it with fresh water then let it sit to dry completely in the sun before putting it back.
nzspokes
25th October 2014, 16:35
Warm water with soap. Rinsed it with fresh water then let it sit to dry completely in the sun before putting it back.

Paper filter?
The End
25th October 2014, 16:37
Paper filter?

No, should've clarified earlier but it is a foam filter. It didn't have any tears and looked new once I had cleaned it.
nzspokes
25th October 2014, 16:41
No, should've clarified earlier but it is a foam filter. It didn't have any tears and looked new once I had cleaned it.

Re-oiled it? Or it didnt have oil on it first?
The End
25th October 2014, 16:55
Re-oiled it? Or it didnt have oil on it first?

No I didn't, it didn't have on the filter prior to cleaning either.

Interestingly just took it for a blat up to road for 15 mins and had no issues at all. Hopefully this isn't going to be a randomly occuring thing.
nzspokes
25th October 2014, 17:01
I would say it wasnt dry. I worked on a bike that the guy had washed the paper filter an wondered why the bike flooded horribly after.
awa355
25th October 2014, 17:01
Click here for several 50cc scooter service manuals. Your Yamaha is listed. Might be useful. The air filter should be oiled.

http://www.49ccscoot.com/manuals/manuals.html
nzspokes
25th October 2014, 17:06
Click here for several 50cc scooter service manuals. Your Yamaha is listed. Might be useful. The air filter should be oiled.

http://www.49ccscoot.com/manuals/manuals.html

Well yeah if its a foam one. So would be jetted to suit.

If they have jets.....
awa355
25th October 2014, 17:16
Well yeah if its a foam one. So would be jetted to suit.

If they have jets.....

According to this extract they do.

http://i1074.photobucket.com/albums/w420/awa355/Untitledpicture-38.png
The End
25th October 2014, 17:36
According to this extract they do.



Can't seem to view that image.

I'll have another go tomorrow and oil the filter.
SNF
25th October 2014, 18:19
They do have jets. When you oil it, just a little bit of oil will do so its mildly damp. Don't drown it. If you can wring it and oil dribbles out its too much and it'll bog again.