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Old 11-07-2014, 06:55 PM   #481
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Below are some helpful setups you can try for the XI. Each are based off different track layouts, surfaces and motors but they can give you a good idea of what to try. Again, start with building the car to instructions and just do your tweaks from there.

http://www.tqrcracing.com/rc_tools/m...ew.asp?s_id=26
http://www.tqrcracing.com/rc_tools/m...ew.asp?s_id=43
http://www.tqrcracing.com/rc_tools/m...ew.asp?s_id=44
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Old 11-07-2014, 07:19 PM   #482
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Below are some helpful setups you can try for the XI. Each are based off different track layouts, surfaces and motors but they can give you a good idea of what to try. Again, start with building the car to instructions and just do your tweaks from there.

http://www.tqrcracing.com/rc_tools/m...ew.asp?s_id=26
http://www.tqrcracing.com/rc_tools/m...ew.asp?s_id=43
http://www.tqrcracing.com/rc_tools/m...ew.asp?s_id=44
Thanks!

For 64pitch where would you start for spur size?
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Old 11-07-2014, 07:44 PM   #483
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Mid 80s with a pinion in the 40s. You can use quite a broad range from 70-100t spurs and still achieve a good FDR
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Old 11-07-2014, 11:18 PM   #484
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Switch it up to 64p gears. Usually the baseline is around 4.00 for FDR and the XI Sport has a 2:1 internal ratio so gearing is easy. Otherwise you may want to drop down to the range of say a 58t/29t spur/pinion in 48 pitch to achieve a 4.00 FDR and check your lap times and motor temps from there. I am running VTA on a 25.5 Novak with full timing and an FDR of 3.92 and my temps are around 140 after a 6 minute run. My gearing is set at 64p gears with a 94t spur and 48t pinion.
Xi sport has an ir of 2:0... ultimate is 2:1
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Old 11-07-2014, 11:38 PM   #485
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Xi sport has an ir of 2:0... ultimate is 2:1
2 turns for each 0 turn?

o_O
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Old 11-08-2014, 07:53 AM   #486
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Xi sport has an ir of 2:0... ultimate is 2:1
Page 2 of the manual dude:
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3 Racing Sakura XI Sport-100_3720.jpg  
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Old 11-12-2014, 07:01 PM   #487
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Mid 80s with a pinion in the 40s. You can use quite a broad range from 70-100t spurs and still achieve a good FDR
Ok I am a little confused now...based on this comment I got a 88T 64 pitch spur and a 43T 64 pitch. They will not mesh together..... so what size pinion and spur actually work together ? At least not with 3 motor mounting screws... two screws it will work
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Old 11-12-2014, 08:41 PM   #488
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Ok I am a little confused now...based on this comment I got a 88T 64 pitch spur and a 43T 64 pitch. They will not mesh together..... so what size pinion and spur actually work together ? At least not with 3 motor mounting screws... two screws it will work
Just keep going up from there. Try a 90/45 and 92/46 and so on, eventually you find the sweet spot for gearing. It's going to vary with what you are running. Like I said I am running a 94/48 and I can fine tune with the same spur and switch down to a 47 or 48 pinon or go up all the way to a 55tooth pinion as well.
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Old 11-12-2014, 09:53 PM   #489
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Just keep going up from there. Try a 90/45 and 92/46 and so on, eventually you find the sweet spot for gearing. It's going to vary with what you are running. Like I said I am running a 94/48 and I can fine tune with the same spur and switch down to a 47 or 48 pinon or go up all the way to a 55tooth pinion as well.
what a pain trying to find something that will mesh together with the motor mount restrictions. I am guessing you're using all three screws to mount the motor?
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Old 11-13-2014, 05:37 AM   #490
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what a pain trying to find something that will mesh together with the motor mount restrictions. I am guessing you're using all three screws to mount the motor?
Yeah, once you find a gear combo that meshes well you will be all set. Spur gears in the 90 range seem to be a good fit and offer a variety of pinions for tuning a good FDR. I was wrong to say start in the 80s since they are a little too small and won't mesh right, my bad.
Just settle on a spur gear size for now and then adjust only the pinion from there to get a good FDR. Let's make it easy and start with 96 for a spur, that leaves you a good range to choose from for pinions, from 44-55 and maybe a few more. Run laps for 5 minutes and check the temps and lap times and then just switch the pinion out from there to adjust and find the sweet spot.
3Racing makes some nice inexpensive gear sets too so you can stock up on a wide selection.
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Old 11-13-2014, 08:08 PM   #491
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ok got the 96T spur.

any tips on sealing the rear gear diff so it doesn't leak?
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Old 11-14-2014, 05:27 PM   #492
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ok got the 96T spur.

any tips on sealing the rear gear diff so it doesn't leak?
Silicon, run a small bead of clear flexible silicon around the outside to seal it off. Make sure not to overdo it and get it in the tracks for the belt. Silicon is flexible enough you can cut it and pull it off to rebuild the diff but it will hold up and prevent leaks. You can usually find aquarium/marine silicon at any hardware store.
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Old 11-15-2014, 06:16 AM   #493
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looks like I need to do that to the screws too, it seems to be leaking from the screws
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Old 11-18-2014, 11:37 PM   #494
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ok got the 96T spur.

any tips on sealing the rear gear diff so it doesn't leak?
The Sakura XI Sport Facebook page recommends using Green Slime on the gasket.
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Old 12-10-2014, 11:25 AM   #495
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66T Spur & a 35T Pinion, 48 pitch.

Coming off at 3.77 FDR with a 17.5 Reedy Sonic mach 2.
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