ATP epic

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egbrig

Harbor, I want to say thank you for your review. That was the best review I've read in awhile. I have always wanted to put an O-scope on and see what is really happening. Great read, great info!
 
Harbor

Harbor

Location
Stockton
Brian_216 said:
The old epic worked with 61x.

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Click to expand...

Ya it's a good question. Airtime site states 62t charging.

When I had all those issues 62t stator was one of the first things Airtime verified I was using

My enhancer works with both 61x & 62t
 
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Brian_216

Brian_216

Location
Harveys Lake PA
Harbor said:
Ya it's a good question. Airtime site states 62t charging.

When I had all those issues 62t stator was one of the first things Airtime verified I was using

My enhancer works with both 61x & 62t
Click to expand...


Back from the dead here. I tried my HX3 with the jetnetics wheel tonight and it ran like total crap. It seemed really lean and kept shutting off. Same jetting that just worked on total loss. I'm going over everything tonight.

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Harbor

Harbor

Location
Stockton
Well that zucks! If it's a 62t stator and wheel you could swap to a stock flywheel and retry. If it's 61x prolly got to do both. I am Interested to know how it goes, that flywheel seemed promising from the write up.
 
Brian_216

Brian_216

Location
Harveys Lake PA
Yes its all 62t. I put a timing tape on tonight and ran on a timing light. It held a flat 20 degree curve. At low rpm the light and timing marks on the tape jumped all over but under throttle and revving it held at what I had it set for. The only exception was it was 5 degrees out from my specified timing. I used the timing offset function to make the correction. It got a little hot running on the shop stand so I will try to do some on water testing tomorrow evening and report back. Seeing as I was +5 degrees from specified I was running 37 degrees last I water tested. It could explain the shutting down like it was lean. I hope to get to the bottom of this soon.

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Harbor

Harbor

Location
Stockton
That's what mine did too, bounce around on lower rpm's then smooth out on higher rpm's and the fantom timing changes, mine wouldn't hold a flat curve then later held a curve I drew, wtf! In my case and poizens case the offset didn't help the phantom timing changes. Ours were intermittently off by 10 so your wheel sounds a little better. When it gets a load on the pump it really goes wacko, I got used to my symptoms so I just backed trailer with ski strapped down into water and ran it on the trailer, it would not rev out correctly and had a huge power loss, bogging when Reving up under load on the trailer, totally did not sound correct or crisp.

In the end it was more than just timing, it also had a missing spark issue too, "not sparking every TDC while cranking" as well as a week thin blue spark, but with the OE wheel it sparked every TDC event and the spark was a nice thick bright yellow spark with the blue spark inside.

Good luck Tuesday night, Ill hope for the best!
 
Harbor

Harbor

Location
Stockton
Your using resistor spark plugs too I would imagine, don't want EMF frequency disturbing the CDI's operation. I'am sure you know this already just thought I'd mention it.

Have you tried the MSD's enhancer curve to verify it's not a timing curve issue ? When I run different curves, I've found that flat portions of the curve before the advance or too much timing too early make the ski sound and run rough/poorly with poopy throttle response during these portions of the curve, but when the rpm's are up at a point where the engine can use the timing it sounds normal and hits like a mofo.....


The enhancer curve is a simple test to eliminate a curve issue

Your Cdi is flashed back to OE flywheel, TBM was flash TBM B117

Chris at Airtime has been great on tech issues btw

Edit: when you connect to the Cdi the flash prefix is in the part number displayed, if it show TBM B117 in the part number your flash is for the TBM wheel and needs to be flashed back to the OE part number for use with OE wheel

Edit: flash prefixes are OEM B117 for OE flywheel and TBM B117 for TBM flywheel
I edited above info Pardon my error
 
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Brian_216

Brian_216

Location
Harveys Lake PA
badvinny said:
Have you emailed Chris? He is very good at helping you through issues like that.
Click to expand...
I have been dealing with Chris all along. I swapped ALL the other items from stator to coil to rectifier. finally the only resolution I got was installing a stock cdi on my 1105 with a dry pipe. even with the instant rev limiter it ran better than it did with the epic. so far I have wasted weeks of time, bought a flywheel stator and a bunch of other stuff. now I'm told I need to send this to the UK to have it inspected and then if it tests bad I will get a replacement. with any luck I'll be riding by august. I am not the most happy person right now. I'll be putting total loss back on for a few weeks I guess.

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Brian_216

Brian_216

Location
Harveys Lake PA
Harbor said:
Your using resistor spark plugs too I would imagine, don't want EMF frequency disturbing the CDI's operation. I'am sure you know this already just thought I'd mention it.

Have you tried the MSD's enhancer curve to verify it's not a timing curve issue ? When I run different curves, I've found that flat portions of the curve before the advance or too much timing too early make the ski sound and run rough/poorly with poopy throttle response during these portions of the curve, but when the rpm's are up at a point where the engine can use the timing it sounds normal and hits like a mofo.....


The enhancer curve is a simple test to eliminate a curve issue

Your Cdi is flashed back to OE flywheel, TBM was flash 117

Chris at Airtime has been great on tech issues btw

Edit: when you connect to the Cdi the flash prefix is in the part number displayed, if it show 117 in the part number your flash is for the TBM wheel and needs to be flashed back to the OE part number for use with OE wheel
Click to expand...
funny my serial number says OEM B 117 _ _ _ _ so maybe that's the issue?

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