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 Forum: Buggy Discussion - Large Buggies and Sand Rails   Topic: Turbos and Clutches Roketa GK 800s

Posted: Tue Apr 04, 2017 5:21 pm 

Replies: 8
Views: 182


I haven't heard of clutch problems as much as third gear being a little weak and blowing out.

 Forum: Maintenance and Repairs - Full Sized Buggy and Sand Rails   Topic: Help - Joyner 650 07 Transmission/clutch or engine swap

Posted: Tue Apr 04, 2017 3:53 pm 

Replies: 7
Views: 194


The cross point screws can sometimes be removed with an impact driver. I have also had luck hammering in the correct bit and easing out a screw.

https://www.northerntool.com/shop/tools ... 6882_36882

 Forum: Maintenance and Repairs - Full Sized Buggy and Sand Rails   Topic: Help - Joyner 650 07 Transmission/clutch or engine swap

Posted: Tue Apr 04, 2017 1:30 pm 

Replies: 7
Views: 194


The larger Joyner buggies that have a dual overhead cams are the Chery engines. Yours is a Mitsubishi 2G24 and uses the Suzuki F-series transmission you would find in a F8 or F10 powered car. I'm not sure how many Joyner dealers are keeping up with carbureted 650cc parts since Joyner has gone exclus...

 Forum: Automotive Engine Swaps   Topic: Rocket 800 motor swap with 650 Joyner easy or not

Posted: Mon Apr 03, 2017 3:23 pm 

Replies: 7
Views: 186


The two best people to ask about 650 upgrades are GhostHunter and JBQuadRider. Both of them had very respectable Sand Spiders that made UTV's breathe their dust. Not only will they give you good advice, they may even have some good parts squirreled away for the right buyer.

 Forum: Automotive Engine Swaps   Topic: Rocket 800 motor swap with 650 Joyner easy or not

Posted: Mon Apr 03, 2017 2:50 pm 

Replies: 7
Views: 186


The 800cc Joyner Uses a different transmission than the 650 Joyner or 800 Roketa. If you're going to go to the trouble of swapping a different engine, you might as well use a common automotive engine that has more HP and is worth the work. BTW: You will generally see two types of larger buggy engine...

 Forum: Automotive Engine Swaps   Topic: Rocket 800 motor swap with 650 Joyner easy or not

Posted: Mon Apr 03, 2017 2:07 pm 

Replies: 7
Views: 186


Same transmission, but the motor is wider. You may have to modify the rear arms and cage in addition to the motor mounts.

 Forum: Joyner   Topic: HELP 650 commando rear differential

Posted: Fri Mar 31, 2017 10:08 am 

Replies: 1
Views: 108


Contact Prattville Powersports or Joyner USA to see if they can get you the parts. Joyner EU had few UTV's shipped there, so they most likely will not have anything. McCoy Motorsports may have something for your Commando or have some other ideas. Your best bet will be to call these places since I do...

 Forum: Engine Clinic - Full Sized Buggies and Sand Rails   Topic: gk 40 800cc no start

 Post subject: Re: gk 40 800cc no start
Posted: Thu Mar 30, 2017 2:21 pm 

Replies: 3
Views: 176


I think the GK40 uses the SOHC Suzuki F8 engine and not the DOHC Chery SQR372.

 Forum: Maintenance and Repairs - Full Sized Buggy and Sand Rails   Topic: chery 800cc firing order

Posted: Thu Mar 30, 2017 1:49 pm 

Replies: 3
Views: 97


To see if it fires 1-2-3 or 1-3-2, look at the cams. All valves will be closed on the compression stroke for that cylinder. I could not find this information in any of Chery links, so am just going by basic auto theory.

 Forum: Maintenance and Repairs - Mini Buggy   Topic: Carter Intercepter GTR 300

Posted: Thu Mar 30, 2017 9:46 am 

Replies: 97
Views: 10344


The stock 4-valve head and open differential gave the GTR's SYM more spunk than the CN250 or CF250. CFmoto has the advantage of the dual-range CVT for climbing, but you can usually out run these engines with a GTR SYM. I think the flex joint in the header will limit exhaust flow verses a one-piece p...

 Forum: Engine Clinic - Mini Off Road Buggy   Topic: Wiring issue?

 Post subject: Re: Wiring issue?
Posted: Thu Mar 30, 2017 9:38 am 

Replies: 2
Views: 108


Your flywheel and pickup location set mechanical advance while your CDI sets electrical advance. I would start by looking at these two pieces to ensure your ignition timing is not off. Are you setting your valve lash on the compression stroke of the cam cycle? Have you run a compression test on the ...

 Forum: Aftermarket and OEM Parts - Mini Buggy   Topic: 150cc 4v head pros/cons?

Posted: Tue Mar 28, 2017 10:29 am 

Replies: 11
Views: 246


Other than cost, the only other cons are that you have to replace the cam chain with a different length and the 4-head valves do not have a selection of cam grinds to choose from like the 2-valve. The 4-valve head should give you a great performance boost and even better if you get it ported and pol...

 Forum: Aftermarket and OEM Parts - Mini Buggy   Topic: bolt box programmable cdi

Posted: Mon Mar 27, 2017 10:02 pm 

Replies: 4
Views: 158


Scrappy Dog must be labeling them as Bolt Box. I cannot find any other reference to this CDI than what they have put out. see if you can pull a name or part number we can research since none of us have used one.

 Forum: Aftermarket and OEM Parts - Mini Buggy   Topic: bolt box programmable cdi

Posted: Mon Mar 27, 2017 9:37 pm 

Replies: 4
Views: 158


What support did you get from Scrappy Dog? Start with them since they sell this programmable unit and let us know what additional information they provide.

 Forum: Maintenance and Repairs - Mini Buggy   Topic: Tomberlin Crossfire key switch

Posted: Sun Mar 26, 2017 4:36 pm 

Replies: 8
Views: 190


Any three position switch will work. Check out your local boating stores to get ideas.

 Forum: Maintenance and Repairs - Mini Buggy   Topic: Tomberlin Crossfire key switch

Posted: Sun Mar 26, 2017 2:38 pm 

Replies: 8
Views: 190


As key and rocker switches fail, I have always recommended replacing them with marine grade components. It seems the Chinese and automotive models to not hold up well to water and dirt. Mounting them into a water resistant enclosure would help, but this costs almost as much as just buying marine swi...

 Forum: Maintenance and Repairs - Mini Buggy   Topic: Tomberlin Crossfire key switch

Posted: Sun Mar 26, 2017 1:15 pm 

Replies: 8
Views: 190


Instead of battery positive, it will go to ground. Accessory will not be used.

 Forum: Aftermarket and OEM Parts - Mini Buggy   Topic: High Torque Starter for GY6 150 ??

Posted: Fri Mar 24, 2017 9:19 pm 

Replies: 14
Views: 279


The last thing you can do eliminate wiring, switch or solenoid is use jumper cables directly between the battery and starter motor. If there is a difference, you missed something. If your valves are set too tight, compression will be low but turning over will be easier. If your valves are set too lo...

 Forum: Aftermarket and OEM Parts - Mini Buggy   Topic: High Torque Starter for GY6 150 ??

Posted: Fri Mar 24, 2017 8:24 pm 

Replies: 14
Views: 279


Short across the solenoid and see if it cranks better. Your solenoid contacts may be worn reducing voltage flow between starter and battery. I'm sure you checked the positive lead from battery to solenoid to starter motor but also check the heavy ground return wire. Funnyman uses a higher torque sta...

 Forum: Maintenance and Repairs - Mini Buggy   Topic: Tomberlin Crossfire key switch

Posted: Fri Mar 24, 2017 5:41 pm 

Replies: 8
Views: 190


Just as budrizer posted. The common switched lead is ground, ignition lead goes to the CDI ground pin(s) and the start lead goes to the solenoid control ground connection.
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