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Search took 0.01 seconds. Search: Posts Made By: Firehawk989
Forum: 50cc - 124cc 08-26-2015, 02:23 AM
Replies: 23
Views: 15,882
Posted By Firehawk989
Get one of the $12 Ebay tachs to keep track of...

Get one of the $12 Ebay tachs to keep track of your RPMs. The limit for the stock crank is 10k RPM.

If you put your fancy crank in from the other scoot though it should be good to 16k or...
Forum: 50cc - 124cc 08-19-2015, 07:03 PM
Replies: 4
Views: 5,267
Posted By Firehawk989
You could also have valves out of adjustment...

You could also have valves out of adjustment which could cause low compression if they are too tight.

This is highly likely if you have never adjusted the valves or if it has been a long time...
Forum: 50cc - 124cc 08-19-2015, 07:01 PM
Replies: 4
Views: 5,267
Posted By Firehawk989
Check your compression. If it's less than 100 you...

Check your compression. If it's less than 100 you probably toasted the cylinder and you have a good excuse to get a 70cc kit! (Make sure you get a bigger carb with the correct jet sizes if you do...
Forum: 50cc - 124cc 08-19-2015, 06:57 PM
Replies: 23
Views: 15,882
Posted By Firehawk989
Should be somewhere between 4 to 5g sliders. ...

Should be somewhere between 4 to 5g sliders.

Keep the Yamaha belt as they are actually way better than anything else for the Zuma.
Forum: 50cc - 124cc 08-18-2015, 05:46 PM
Replies: 23
Views: 15,882
Posted By Firehawk989
Yea 80 is too small and probably the main reason...

Yea 80 is too small and probably the main reason your top end burned up. Start with an 88 or 85 and go from there, and keep the stock airbox for sure.

Yes the Zumas are geared differently than the...
Forum: 50cc - 124cc 08-17-2015, 08:00 PM
Replies: 23
Views: 15,882
Posted By Firehawk989
Also if you're sticking with the stock Zuma carb...

Also if you're sticking with the stock Zuma carb use an 84 main jet from the Yamaha dealer.
Forum: 50cc - 124cc 08-17-2015, 07:59 PM
Replies: 23
Views: 15,882
Posted By Firehawk989
Yep, stick with the stock airbox but remove the...

Yep, stick with the stock airbox but remove the little rubber snorkel from it to get some extra airflow. The 100cc Zuma uses the exact same airbox, so you don't have to worry about flow issues. If...
Forum: 50cc - 124cc 08-14-2015, 01:35 PM
Replies: 23
Views: 15,882
Posted By Firehawk989
The good news is that a lot of those parts will...

The good news is that a lot of those parts will work on your Zuma, including the Polini carb once you get yourself a 70 kit for the Zuma. Just make sure you stick with the stock airbox and get...
Forum: 50cc - 124cc 08-13-2015, 10:06 PM
Replies: 23
Views: 15,882
Posted By Firehawk989
Putting extra oil in the tank actually leans out...

Putting extra oil in the tank actually leans out the mixture as the oil displaces some of the fuel. Therefore less fuel gets mixed with more air, which = leaner.

Also for a proper plug read you...
Forum: 50cc - 124cc 07-10-2015, 07:34 PM
Replies: 2
Views: 4,505
Posted By Firehawk989
The factory yamaha belt is the best. Only buy...

The factory yamaha belt is the best. Only buy those as replacements.

The big contra spring in your rear pulley has probably gone soft, which can mess up your acceleration. Get a new stock one, or...
Forum: 50cc - 124cc 06-08-2015, 03:16 AM
Replies: 19
Views: 15,832
Posted By Firehawk989
Also check the electrical for the enrichener to...

Also check the electrical for the enrichener to make sure it's getting voltage. I believe they are retracted at start-up to enable the enrichener circuit and then extend once warm to block it off for...
Forum: 50cc - 124cc 06-02-2015, 03:57 AM
Replies: 5
Views: 5,533
Posted By Firehawk989
If it feels like it's not running right you may...

If it feels like it's not running right you may need to adjust your valves.
Forum: 50cc - 124cc 05-23-2015, 03:44 AM
Replies: 2
Views: 4,457
Posted By Firehawk989
Adjust your valves. That is the most common...

Adjust your valves. That is the most common reason for these to run poorly.
Forum: 50cc - 124cc 05-23-2015, 03:42 AM
Replies: 1
Views: 5,158
Posted By Firehawk989
The prebug Zumas are supposed to be lots of fun,...

The prebug Zumas are supposed to be lots of fun, and they have just as many aftermarket parts available as the newer Zumas. You don't get as much storage space as the newer ones because of the...
Forum: 50cc - 124cc 05-11-2015, 10:34 PM
Replies: 1
Views: 4,245
Posted By Firehawk989
Most common thing to do first is adjust the...

Most common thing to do first is adjust the valves.
Forum: 50cc - 124cc 04-21-2015, 03:50 AM
Replies: 7
Views: 8,296
Posted By Firehawk989
Also any chance your battery is dead?

Also any chance your battery is dead?
Forum: 50cc - 124cc 04-21-2015, 03:49 AM
Replies: 3
Views: 4,624
Posted By Firehawk989
Sounds like your carb is way out of whack...

Sounds like your carb is way out of whack adjustment wise. What size main jet is in there? what is your a/f screw set at? and what is your needle position? Also you should make sure there are no...
Forum: General Scooter Discussion 04-15-2015, 02:14 AM
Replies: 17
Views: 16,364
Posted By Firehawk989
Had an experience like this when I bought a...

Had an experience like this when I bought a Hyosung Sense off CL for $200. Taking the plastics off was easy, but the seat bucket area had a panel welded over it which made working on the engine a...
Forum: 50cc - 124cc 04-15-2015, 02:06 AM
Replies: 1
Views: 5,322
Posted By Firehawk989
Is the gas old? If so, drain and put in fresh...

Is the gas old? If so, drain and put in fresh premium gas and maybe a cap of seafoam.

Are you absolutely sure the carb is clean, like took the jets out and made sure they had nothing blocking them...
Forum: The Dawg Pound 04-02-2015, 02:24 AM
Replies: 8
Views: 6,509
Posted By Firehawk989
In the winter, backcountry ski touring: ...

In the winter, backcountry ski touring:
https://www.youtube.com/watch?v=B5buKbcHpeA (http://www.youtube.com/watch?v=B5buKbcHpeA)

In the summer, hiking, mountain biking and kayaking:...
Forum: General Scooter Discussion 03-16-2015, 03:03 PM
Replies: 13
Views: 8,032
Posted By Firehawk989
If it's a '96-'00 Civic, tell him he can put in a...

If it's a '96-'00 Civic, tell him he can put in a gauge cluster from a civic in that year range that does have a tach, and the tach will just work. Plug & play!
Forum: General Scooter Discussion 03-14-2015, 04:59 PM
Replies: 30
Views: 23,584
Posted By Firehawk989
Here's a stock 2T Zuma with 40k miles on it: ...

Here's a stock 2T Zuma with 40k miles on it:

http://www.zumaforums.net/phpBB3/download/file.php?id=22303&t=1

Owner says it's at 43,000 now and still going strong.
Forum: General Scooter Discussion 03-14-2015, 02:49 AM
Replies: 30
Views: 23,584
Posted By Firehawk989
I will just echo what Hank said and say that my...

I will just echo what Hank said and say that my 2T Yamaha BWS had 16,500km on it when I replaced the stock cylinder with the 70cc one. Not because the stock cylinder failed or anything like that, but...
Forum: 50cc - 124cc 03-14-2015, 02:31 AM
Replies: 3
Views: 4,567
Posted By Firehawk989
Ah yea that would do it. Your carb is...

Ah yea that would do it.

Your carb is probably different than mine, so I guess it makes sense that the jet size would be different too.
Forum: 50cc - 124cc 03-11-2015, 11:01 PM
Replies: 3
Views: 4,567
Posted By Firehawk989
Could actually be the choke not working right if...

Could actually be the choke not working right if you have a carb with electric choke.

Otherwise sounds like something in your carb is either out of adjustment or possibly clogged. I would check...
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