Carb help feeler

Post Reply
User avatar
DLSGAP
Posts: 889
Joined: Mon May 14, 2007 10:00 am
Riding Style: Advanced Track Rider
Achievement count: 0
Location: Midlothian

Carb help feeler

Post by DLSGAP » Mon May 06, 2013 1:50 pm

Looking to pick up a project bike soon. It's been sitting 5+ years so I know it will need a fuel system overhaul. I haven't built, or so much as cleaned a carb since the mid 90s... Anyone game to lend a hand? Probably sometime next month
Wear your gear... I'd rather sweat than bleed.
Current bike:
CBR954RR

Former bikes
'87 YSR
' 92 CBR 600F2
'91 ZX7
' 92 ZX7RR
'94 ZX7RR
' 98 ZX7R
'07 ZX10R
' 11 FZ8

User avatar
shilka99
Honorary Club Member
Honorary Club Member
Posts: 1769
Joined: Mon Jun 15, 2009 11:19 am
Riding Style: Track Instructor
Achievement count: 42
Location: Irving

Re: Carb help feeler

Post by shilka99 » Mon May 06, 2013 8:23 pm

This is a really easy job, I've done it on dirtbikes, streetbikes, racebikes and a jet ski. What are you looking to restore? Do you know for certain it sat with fuel in the carbs? If you're lucky the fuel tap was turned off and the engine run dry the last time it ran. Its possible...

My RM-Z450 that Miles knows so well wouldn't run at all before it came to me, but after 10 minutes with the carb open it ran very strong. But the worst I ever saw was the ZX-7R I bought. It had half an inch of green goo in the carb bowls but ran great after 2 cans of carb cleaner hit the trash can.

The best thing to do is get a gasket kit / rebuild kit and find out what the stock jet sizes are. Going back to stock sizes is always a good idea because you know the bike will run fine even if it has had intake/exhaust changes made.
Make sure you have lots of pipe cleaners, small brushes and aerosol carb cleaner. Even safety wire can be useful in cleaning gunk out of small jets. Compressed air can be useful too but only use it when you're absolutely certain there are no small parts that can be shot across the garage never to be seen again. And pay special attention to the float needle/seat combo. Any wear at all on either and both must be replaced. Even if it doesnt look bad - its much easier to replace them than to chase a rich mixture that wont go away even when you go progressively leaner with the jets.

If possible use a workshop manual but this is really not critical if you have a little experience with this kind of work.

And if you're lucky its as easy to clean as this:
Image
Shaun in McKinney
RGV250|520SX/SMR|RSV4 Factory

User avatar
DLSGAP
Posts: 889
Joined: Mon May 14, 2007 10:00 am
Riding Style: Advanced Track Rider
Achievement count: 0
Location: Midlothian

Re: Carb help feeler

Post by DLSGAP » Tue May 07, 2013 5:02 am

For all intents and purposes, we'll say it's a Yamaha xt660. I know nothing of the care or condition other than it was last run 5 years ago +/-...

And I've don't carbs before, but i was still in middle school the last time I tore one apart.
Wear your gear... I'd rather sweat than bleed.
Current bike:
CBR954RR

Former bikes
'87 YSR
' 92 CBR 600F2
'91 ZX7
' 92 ZX7RR
'94 ZX7RR
' 98 ZX7R
'07 ZX10R
' 11 FZ8

User avatar
2track
Posts: 1380
Joined: Sat Jun 20, 2009 3:00 pm
Riding Style: Licensed Racer - Novice
Achievement count: 21
Location: Benbrook Tx. 76126
Contact:

Re: Carb help feeler

Post by 2track » Tue May 07, 2013 8:08 am

Like he said they are real easy just pull everything apart & keep it organized. Maybe take a picture or 2 to have a guide as for your records if you accidentally move stuff. Even after cleaning them you may need to balance the carbs.

User avatar
DLSGAP
Posts: 889
Joined: Mon May 14, 2007 10:00 am
Riding Style: Advanced Track Rider
Achievement count: 0
Location: Midlothian

Re: Carb help feeler

Post by DLSGAP » Tue May 07, 2013 8:15 am

2track wrote:Like he said they are real easy just pull everything apart & keep it organized. Maybe take a picture or 2 to have a guide as for your records if you accidentally move stuff. Even after cleaning them you may need to balance the carbs.
Lucked out there... It's a thumper
Wear your gear... I'd rather sweat than bleed.
Current bike:
CBR954RR

Former bikes
'87 YSR
' 92 CBR 600F2
'91 ZX7
' 92 ZX7RR
'94 ZX7RR
' 98 ZX7R
'07 ZX10R
' 11 FZ8

User avatar
2track
Posts: 1380
Joined: Sat Jun 20, 2009 3:00 pm
Riding Style: Licensed Racer - Novice
Achievement count: 21
Location: Benbrook Tx. 76126
Contact:

Re: Carb help feeler

Post by 2track » Tue May 07, 2013 8:23 am

Ahh just looked it up, its a single cylinder engine. It should be very easy then.

User avatar
DLSGAP
Posts: 889
Joined: Mon May 14, 2007 10:00 am
Riding Style: Advanced Track Rider
Achievement count: 0
Location: Midlothian

Re: Carb help feeler

Post by DLSGAP » Tue May 07, 2013 8:40 am

2track wrote:Ahh just looked it up, its a single cylinder engine. It should be very easy then.
Yeah.. Probably going to make a supermoto out of it
Wear your gear... I'd rather sweat than bleed.
Current bike:
CBR954RR

Former bikes
'87 YSR
' 92 CBR 600F2
'91 ZX7
' 92 ZX7RR
'94 ZX7RR
' 98 ZX7R
'07 ZX10R
' 11 FZ8