Lighting Rods GNG Bracket kit installed

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Lighting Rods GNG Bracket kit installed

Postby snellemin » Sat Mar 23, 2013 7:58 pm

I finally had some time to myself and installed the GNG bracket kit from Lightingrods. Sprayed some hammered paint and came out bitchin'.
I installed the Bikemotive 130BCD and 110BCD crankset spiders for more clearance. I had to use my impact driver just to get the old 16T freewheel off the crankarm. I replaced the 38T chainring for a 39T.

I updated my rearshock to Manitou Evolver ISX-1 2008. Got it for cheap and was brandnew. Took the fork off my second EVG bike and stuck it on the Fuji.

Still need to clean it up a bit, needs a battery harness made, a shield and should be ready for the trails.

So with the stock GNG crank arms, I purchased:

http://bikemotive.myshopify.com/products/custom-acs-crossfire-flanged-freewheel
http://bikemotive.myshopify.com/products/copy-of-custom-110bcd-spider-for-freewheel-crankset-bikemotive
http://bikemotive.myshopify.com/products/custom-130bcd-spider-for-freewheel-crankset-bikemotive

I bought the mounting screws and bolts at Ace Warehouse. M5x.8 screws with corresponding bolts and washers.
I purchased 1mm freewheels spacers from Amazon. These go between the crank arm and freewheel.
To mount the chainrings, I ordered two sets of Origin8 double chainring bolts. I also needed Origin8 Chainring Spacers 0.6mm, which is a bag of 20.

I'm using Lyen 6fet 4110 sensorless controller. Battery power comes from 12s-14s lipo. There is a also a 3 speed switch connected and toned down the phase current to reduce the startup wheelies.

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Last edited by snellemin on Sun Mar 24, 2013 12:21 am, edited 2 times in total. View post history.
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Re: Lighting Rods GNG Bracket kit installed

Postby neptronix » Sat Mar 23, 2013 8:10 pm

Hhmmmm... looks a bit more solid. Interested in seeing how it goes :)
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Re: Lighting Rods GNG Bracket kit installed

Postby snellemin » Sun Mar 24, 2013 5:41 pm

So I went for a few short rides and busted up the belt after a few adjustments. Looks like I will still the chain tensioner. Ordered me a new belt and should be here by Wednesday.
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Re: Lighting Rods GNG Bracket kit installed

Postby Ykick » Sun Mar 24, 2013 5:56 pm

Do you have a name and/or brand for the wheel stand in one of your pics?
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Re: Lighting Rods GNG Bracket kit installed

Postby snellemin » Sun Mar 24, 2013 7:45 pm

Ykick wrote:Do you have a name and/or brand for the wheel stand in one of your pics?


It's called "Rakk" and it's by feedbacksports.com. Got it at REI.
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Re: Lighting Rods GNG Bracket kit installed

Postby Ykick » Mon Mar 25, 2013 11:59 am

Thank you!
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Re: Lighting Rods GNG Bracket kit installed

Postby snellemin » Thu Mar 28, 2013 1:12 am

So I just finished with the bike again. I swapped in an old belt with the original tensioner. I also used the chain tensioner as well. This time I'm using a 46T chainring on the secondary. GPS said 32MPH on 14s1p lipo, with those offroad tires.
The belt did not fail once and I was having a blast. Looks like I'll buy a longer belt with a bigger belt cog. I will also up the phase current a bit.







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Last edited by snellemin on Fri Mar 29, 2013 3:08 pm, edited 1 time in total. View post history.
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Re: Lighting Rods GNG Bracket kit installed

Postby t0me » Sat Apr 06, 2013 2:58 am

Hiya, so you couldn't get the belt and chain to work reliably without the idlers?
Isn't that the point of the new brackets?
Kona Stink-E - GNG based mid-drive - viewtopic.php?f=28&t=56357&p=839416#p839416
Giant Anthem - LightningRods mid-drive viewtopic.php?f=28&t=67014&p=1008007#p1008007
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Re: Lighting Rods GNG Bracket kit installed

Postby snellemin » Sat Apr 06, 2013 5:08 pm

t0me wrote:Hiya, so you couldn't get the belt and chain to work reliably without the idlers?
Isn't that the point of the new brackets?


The brackets let me install bigger chain rings and belt cogs. But since not everything is perfectly cut in a circle the idler are still need for me.
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Re: Lighting Rods GNG Bracket kit installed

Postby snellemin » Mon Apr 22, 2013 2:37 pm

I had bend the bottom bracket part under power, but bend it back. Added small piece of steel onto the frame for the top assembly. Looks a lot stiffer now. I went from 475 to 500 length belt. My thinking is less tension on the belt, thus less wasted power. With the longer belt the plates are fully extended, both top and bottom. A new KMC Z410 chain has also replaced the old worn secondary chain. Hopefully I'll have some time today or tomorrow to actually run the bike.

Zombies throttle interface is a nice match up with the GNG kit. Much better control on the bumpy single tracks.

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Last edited by snellemin on Mon Apr 22, 2013 2:39 pm, edited 1 time in total. View post history.
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Re: Lighting Rods GNG Bracket kit installed

Postby richard purchon » Mon Apr 22, 2013 2:56 pm

dont rely on your belt tensioner using just one bolt into the motor case.
the case looks thick,but its not.its only a couple mm thick it will crack/break out.
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Re: Lighting Rods GNG Bracket kit installed

Postby snellemin » Mon Apr 22, 2013 3:06 pm

I saw that chain tensioner you had made. But I have over a 100 miles so far on mine and most likely built something like yours if mine ever fails.
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Re: Lighting Rods GNG Bracket kit installed

Postby richard purchon » Mon Apr 22, 2013 3:08 pm

motor cover drive belt side
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motor_side_cover.jpg (79.08 KiB) Viewed 1814 times
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Re: Lighting Rods GNG Bracket kit installed

Postby snellemin » Mon Apr 22, 2013 10:20 pm

My whole kit moves under power. I need to install a torque arm soon.
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Re: Lighting Rods GNG Bracket kit installed

Postby christerljung » Tue Apr 23, 2013 3:41 am

snellemin wrote:My whole kit moves under power. I need to install a torque arm soon.

Torque arm is a very good and simple mod. My home-made GNG-sheets are in weak aluminium but the kit can still handle 6kw peak without bending. See pics in the thread:
viewtopic.php?f=28&t=46113
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