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Purple Power 421 Serval


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8 hours ago, sleeper06 said:

Shrink butts will work but I always like using solder and marine grade heat shrink with the sealant that oozes out when heated this way it’s 100% customer proof 

Yup, i use motorsport grade crimp splices and finish them off with adhesive lined heatshrink. IMO solder should never be used on wiring exposed to extreme vibration like on an ATV. The soldering creates cold joints at each end which makes the wire brittle. Here are some examples from an engine harness i built for a Mazda, same premise i used above. 

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Hell yeah! I like how meticulous you are with building the whole setup.. gettin in spec with motor, doing frame mods.. purple banshees are bad to the bone! Some of the most custom out here! 

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On 7/25/2018 at 6:27 PM, sleeper06 said:

It depends who’s using the equipment like anything. I’m an electrician by trade . I also wire drag cars for a few local shops. I’ve never had a failure. I try n use weather pac connectors as much as possible 

Definitely a good point. Weatherpack stuff is nice and affordable. I try to use Deutsch where possible but tooling up for them is expensive!!  

20 hours ago, vrx46 said:

Hell yeah! I like how meticulous you are with building the whole setup.. gettin in spec with motor, doing frame mods.. purple banshees are bad to the bone! Some of the most custom out here! 

Thanks man! I like doing things the right way, sometimes costs a little more and takes longer but always worth it in the long run. 

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  • 1 month later...

Got this thing wrapped up and rode it last week. It was a bit rich on the pilot and main but it has been raining every weekend since i fired it up so have not really had a chance to fully dial it in.

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After waiting on the crankshaft for about another month, the one i received still had runout on the flywheel side web in almost the same manner. I did not get a chance to check total runout myself but was assured it was below spec so i slapped it in due to time constraints. Still not happy about that whole ordeal and definitely will not be giving them my business in the future.
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With a .031” base i was at .045” squish at the outside edge and at .050” on the inside edge on both cylinders, measured twice in each hole with the same exact results.
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And of course, 6psi for 10+ minutes!
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looks good man 

edit: dont people use different thickness base gaskets to adjust squish too? say if you had a .020 gasket and wanted to increase your squish a bit and change to a .030, does that affect port timings at all? or at what point would it affect port timings if any, im sure sleeper or someone will chime in 

Edited by Ayesully810
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Getting these pipes on with new O rings was a pain in the fucking ass

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Im trying out this vibrant hose wrap that is rated for 500* radiant. Same stuff i am using on my turbo drain hose that runs close to my manifold.

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And a pic of RU-1090s and shearers for someones future reference
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Picked up a set of padla brats for the BHQ ride. I went with the play cut in hopes they will be a little more durable. These things are really
Light on DWT A5s compared to sandstars on ITP .190 wheels.

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Mounted up a used set of dune trackers. ec2cfed9141a48ae9315182057986bdc.jpg

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And Shout out to JD for hooking me up on a last minute order for light bar brackets and a DC conversion for next weekend!! You the man.


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7 minutes ago, Ayesully810 said:

looks good man 

edit: dont people use different thickness base gaskets to adjust squish too? say if you had a .020 gasket and wanted to increase your squish a bit and change to a .030, does that affect port timings at all? or at what point would it affect port timings if any, im sure sleeper or someone will chime in 

Thank you! Yes, since it is moving the cylinder up/down it is also moving the ports up/down and with the stroke remaining the same, the port timings will be affected to a small degree. I cannot answer how critical this would be in higher power setups though. And FYI Jeff at FAST said these cylinders were setup to run a .031" base so that is what i started with. 

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  • 3 weeks later...

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