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post #1 of 9 (permalink) Old 4 Weeks Ago Thread Starter
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New to post & pocket rockets

I recently received a new Grand Prix MX3 Pocket Bike from a friend. I think it's a 47cc engine but am not sure (maybe even smaller, do they make a 39cc engine?). He's never started it & knows nothing about it. My (2nd) question is what fuel mixture to use. I've read from 30:1 all the way up to 50:1. I could not find any info specific to my model of bike. Any info anyone can provide, would be greatly appreciated! Thx, johnnyb
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post #2 of 9 (permalink) Old 4 Weeks Ago
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more then likely if its new then it has the 40cc 4 stroke no mix fuel

if its the 2 stroke 40:1 is fine get a new spark plug

Faster then a speeding E Revo

Last edited by MrKitty; 4 Weeks Ago at 12:02 PM.
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post #3 of 9 (permalink) Old 4 Weeks Ago Thread Starter
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Thx for your info, I'll give that a try. It's an older one & it's definitely a 2cycle engine.
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post #4 of 9 (permalink) Old 4 Weeks Ago
Re: New to post & pocket rockets

Yes, I believe you have a 47cc reed port 2 stroke engine. Its really about 39cc, 40mm bore and 32mm stroke, the later 49cc, 44mm bore, 32mm stroke and a heavier crankshaft. I own a few of them here and many parts, lol. Go online on the www. minipocketrockets .com They sold the MX3 2 stroke 47cc MT-A3. I have an A1, A2 I got from them and A4 water cooled 50cc Blata clone. Does yours have a pumper carb?? The A1 is called a Cagllari Daytona.
Many HP parts for them still. See modified Cag engine.
Attached Images
File Type: jpg 49cc Boosted306 engine.jpg (431.6 KB, 5 views)
File Type: jpg Twin Engine Cag1.JPG (510.7 KB, 5 views)
File Type: jpg Twin Engine Cag2.JPG (508.3 KB, 5 views)
File Type: jpg C1 Eng water cooled.jpg (494.5 KB, 5 views)
File Type: jpg C1 water cooled2.jpg (491.4 KB, 4 views)

Empty Pockets Racing: The difficult we do, the impossible takes longer.....

Last edited by EPR; 4 Weeks Ago at 11:33 PM.
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post #5 of 9 (permalink) Old 1 Week Ago Thread Starter
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Not sure if it's a pumper carb or not. How do I identify if it is one?
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post #6 of 9 (permalink) Old 1 Week Ago
Re: New to post & pocket rockets

I believe you have the 47cc MX3 Cag., it came with a 15mm pumper carb. and 5 spoke alum rims too. Here in California www.minipocketrockets.com sold them, bought my A1 from them. here is a 15mm pumper carb and then a 13mm piston carb.
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File Type: jpg My 43cc Scooter2.jpg (369.7 KB, 3 views)
File Type: jpg 49cc Boosted306 engine.jpg (431.6 KB, 3 views)

Empty Pockets Racing: The difficult we do, the impossible takes longer.....

Last edited by EPR; 1 Week Ago at 09:49 PM.
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post #7 of 9 (permalink) Old 1 Week Ago
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Re: New to post & pocket rockets

This is a 2005 MX3...…Its just missing the lower fairing...



This was a 2006 MX3.....




I redesigned / stretched it a lil....



Then I redesigned/restrengthened it a lil more...…..

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Last edited by CAM2; 1 Week Ago at 11:29 AM.
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post #8 of 9 (permalink) Old 1 Week Ago
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Re: New to post & pocket rockets

Quote:
Originally Posted by EPR View Post
I believe you have the 47cc MX3 Cag., it came with a 15mm pumper carb. and 5 spoke alum rims too. Here in California www.minipocketrockets.com sold them, bought my A1 from them. here is a 15mm pumper carb and then a 13mm piston carb.
The WYK192 15mm pumper carbs mostly came on the earlier model pocket dirtbikes , pocketquads and the sidecar racers.........

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Last edited by CAM2; 1 Week Ago at 10:34 PM.
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post #9 of 9 (permalink) Old 1 Week Ago
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Re: New to post & pocket rockets

Quote:
Originally Posted by Johnnyb View Post
I recently received a new Grand Prix MX3 Pocket Bike from a friend. I think it's a 47cc engine but am not sure (maybe even smaller, do they make a 39cc engine?). He's never started it & knows nothing about it. My (2nd) question is what fuel mixture to use. I've read from 30:1 all the way up to 50:1. I could not find any info specific to my model of bike. Any info anyone can provide, would be greatly appreciated! Thx, johnnyb
The reason why theres no specifically named bike for engine info is because alot of these Chinese bikes come with only 2 different types of 2 stroker engines[reeded and piston ported] and both are broken-in and run in the kind of same method...

Reason why is because these engines are "TOOL BASED" engines originally built for trashpumps and power augers etc. and all tool engines are treated the same just like different brand tree pruner / weedeater machines.........…





The Chinese adapted the 2 stroke industrial tool engines by manufacturing parts to mount to crudely welded recreational vehicle frames to obtain as much American money as possible...They're also built by Chinese kids...

Then came the HP parts and the bling bling to make a super grab at the American dollar...In the end a $169.00 cag that was $237.00 shipped to your door could end up in excess of $500.00+ after purchase and upgrade parts..It adds up quick...LOL

Brand new engines require a proper break-in method to ensure engine longevity and maximum power........

For a never run engine I suggest 32:1 of non synthetic 2 stroke oil thats TCW-3 approved........

I do a run-in on-the-stand heatcycle method before even putting a load on it to help seat the rings...

I start the engine and run it for 3-4 minutes blipping the throttle every 20-25 seconds a couple of blips at a clip...Then I shutdown and let it cooldown totally then I do the same method 3 more times......

Then I attempt to ride it and you're not supposed to go past 1/2 throttle varying speeds for the remainder of the first tank...

Second tank you mix the fuel 40:1 and ride no higher than 5/8-3/4 throttle til tank is empty..

Third tank mix to 50:1 and let it eat.........After tank #3 you can switch to synthetic 2 stroke oil..

When you ride it youre supposed to basically stab the throttle and go,,,blipping the throttle because it sounds cool prematurely wears out the clutch through heat related stress exerted on it via clutch slippage......

When you mix your fuel only mix it a pint at a time for 32:1 and 40:1....This way you dont have a gallon of 32:1 and a gallon of 40:1 sitting around or guessing how much fuel to add to make the ratio right after removing a pint from each gallon....LOL

Good Luck

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To
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Masterpiece

Last edited by CAM2; 1 Week Ago at 11:15 AM.
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