250cc Roketa MC-54B-250 Problems.. By Chris Waddle (Read 28,651 times)

[speedracer]

reply 101 Check with a Lowes or Home Depot. Take one of the good bolts there and use their screw or bolt finder which are mounted on the walls.

[pop1205]

new choke on my scoot now ;D going to order my screw thing for my valve tomorrow! sooo close to havin my scoot back up and running cant wait. thanks for all of the help guys!!!

[pop1205]

Hey guys, where is the air/fuel mixture screw on this carb? I know where the idle screw is. Is it the flat head screw on the bottom of the carb? My valve screw will be here tomorrow, so just doing my research now so I can get my scoot right

[Alleyoop]

Pop1205,
If your carb DOES NOT LOOK LIKE this then YES the Air/Fuel Mixture is on the Bottom.
Alleyoop

[pop1205]

Alleyoop,

Hmm, looks similar to that, but my choke doesn't sit like that. Mine actually looks bigger? I assumed it was the one on the bottom. That's where the mechanic who did my first tune up said it was. I was just making sure. It's in a very awkward position. Have to use a L shaped driver to turn it with out burning myself on the muffler. Luckily I bought a 24 piece set that has that ;D On the road to victory! Just checked online about my order for the valve screw and it's for sure going to be here, unless any unforeseen incidents happen! HAHA.
Keeping the chin up and am excited to get my scoot right

[pop1205]

Question (What a surprise?) LOL

When adjusting my valves, I know to do the intake valve when the engine is at TDC. That means there is no tension (or compression is the right word?) on the top spring/valve. When it's at TDC you set your intake to .004". Okay, that's not a problem at all. A little point of confusion I'm having is adjusting the bottom valve. Do I adjust this one when the engine is at TDC, when the bottom valve/spring is fully compressed? When reading the tutorial it doesn't make this totally clear. I would imagine setting the exhaust valve when fully compressed would actually be impossible. As you adjust the adjuster, the arm would just move along with it. Are you supposed to rotate your engine to where the exhaust valve is fully UNcompressed and the top is fully compressed? In other words, BDC (Bottom Dead Center). Yes, I am making up terms ;D But just a thought. I (idiotically) adjusted my top valve perfect each time, but always tried to adjust my bottom valve while it was still compressed. I would start the scooter and have a loud CLATTER CLATTER CLATTER CLATTER sound and just believed it to be the intake valve. Could that have been the exhaust vavle clattering from me tinkering with it when it was fully compressed?! I just got to thinking about this! Am I right or am I just blabbing on? LOL
Thanks guys!

[pop1205]

Well.... ordered that adjustable screw..... and was too small..... slid right through the valve hole......... Soooooooooooo.. trying to find a 250cc valve screw is actually rare...... Wish me luck...

[Alleyoop]

Pop1205,
If it is at TOP DEAD CENTER both Valves are off the High Lobe of the Cam and you can adjust both of them without having to rotate the crank again. But if the Spring is compressed and you adjusted it that is where your CLATTERING comes in. So make sure it is at TOP DEAD CENTER and at that point you should be able to wiggle BOTH Rockers with your fingers THEN adjust both of them.

Jrryan he is trying to find the Adjusting STUD and Lock NUT for the ROCKER ARMS.

Alleyoop

[Alleyoop]

Jrryan,
WOW!! That did not take long I think you ought to change your call sign to GOOGLER I have to say you are DA MAN for finding the right parts for anything ;D
Alleyoop

[pop1205]

That's the exact carb I have!! LOL

Alleyoop,

Ok thanks! That would explain a lot of my clattering huh? lol!
I will be sure to make sure both rocker arms are able to wiggle. Thanks!

Jr,

Wow!!!!! I have been Googling all day trying to find the adjuster screw and could not! Give you five mins and you can make miracles
Thanks for all of the help guys!!!!!!!!!
You guys totally rockkkkkk!!!!!

[pop1205]

Thanks. Just ordered the adjuster and nut. Probably isn't necessary to order the nut, but I like new things ;D Hopefully this will fit! I've checked with scooter shops around where I live, auto shops, auto stores, hardware stores and cannot find something that will fit this! I was trying to avoid the really expensive shipping costs..... This stuff is EXPENSIVE.

[pop1205]

Has anybody ordered from gokartusaonline.com before? I placed my order early Friday morning and chose One day shipping by noon, and I'm expecting it to come today. Yet, on my order invoice I have no order number nor do I have tracking information! I go to my account and hit invoice history and nothing shows up? But the money has been taken out of my account!
Just wondering if anybody ordered from them and this happened to them and they still received their shipment?
Thanks guys!

[pop1205]

Gave them a call, and they never even received my order!!!! But they took the money out of my checking account! I give them my username and everything to their website and I'm not even in the database?!! Wow. The lady says I may need to replace my order! What the hell?! And spend MORE money?!

[speedracer]

Dispute the charge with your bank or credit card company.

[pop1205]

I am. This is ridiculous.