High On Octane
Ton Up or Shut Up
Couldn't help but notice the Colorado plate on the dual sport. That's a cool little gadget.
Enfield Tracker: War Pig Rennaissance
- Thread starter AgentX
- Start date
You can always get those guards to hold it up for you... Oh wait, they just knock it down. Never mind.
JustinLonghorn
No Purple Hearts, No Blue Ribbons
Contact is the secret, it's the moment when everything happens.
AgentX
Over 1,000 Posts
I was singing that all morning.
https://www.flickr.com/photos/15217562@N00/16298291281/
It was an ugly start, but it got going better later as it gained some compression from the rings bedding in... I need to do some tuning and get it a few more things running before I can get it on the road.
I think my taper bearing headset is not doing what it should. Feels like there's a rattle, and I think it's an issue related to the way the race fits in the cup. I may be ditching that in favor of the stock loose-ball cups, and maybe I'll come back to it after some more machining.
https://www.flickr.com/photos/15217562@N00/16298291281/
It was an ugly start, but it got going better later as it gained some compression from the rings bedding in... I need to do some tuning and get it a few more things running before I can get it on the road.
I think my taper bearing headset is not doing what it should. Feels like there's a rattle, and I think it's an issue related to the way the race fits in the cup. I may be ditching that in favor of the stock loose-ball cups, and maybe I'll come back to it after some more machining.
AgentX
Over 1,000 Posts
Tuning's not going so well. Starting is an ordeal and needs a lot of throttle--already took a nice knee-to-bar shot off a kickback. After a long series of methodical testing on video for Chumma which yielded nothing, I got it to fire up by the same method I had been using--lots of throttle, no choke, kicking hard.
It ran super-lean and snapping back at me badly. You can see the flashes at the carb. (Air can was removed for the videos to show I had air flow and demonstrate the slide position at rest.) But when I added choke, it started to run at a hammering high idle.
https://www.youtube.com/watch?v=tiraMZLjmUI
Chumma's going to send me some richer idle jets and a 3-way timing pinion. One of the concerns is the possible low octane of the gas here, so I'm looking for some additive I can get locally (pure toulene, maybe...)
The fight continues.
If we were in the US, this would have ended long ago with good gas and Chumma and Tom (the Ace Engineering guys) on hand to get it all right from the start...working by proxy across three continents and third-world variables has its disadvantages. Not to mention my own involvement, which probably handicaps the enterprise more than anything else.
It ran super-lean and snapping back at me badly. You can see the flashes at the carb. (Air can was removed for the videos to show I had air flow and demonstrate the slide position at rest.) But when I added choke, it started to run at a hammering high idle.
https://www.youtube.com/watch?v=tiraMZLjmUI
Chumma's going to send me some richer idle jets and a 3-way timing pinion. One of the concerns is the possible low octane of the gas here, so I'm looking for some additive I can get locally (pure toulene, maybe...)
The fight continues.
If we were in the US, this would have ended long ago with good gas and Chumma and Tom (the Ace Engineering guys) on hand to get it all right from the start...working by proxy across three continents and third-world variables has its disadvantages. Not to mention my own involvement, which probably handicaps the enterprise more than anything else.
High On Octane
Ton Up or Shut Up
I'm pretty sure your timing is too far advanced. I would retard it 4 or 5 degrees and try again.
AgentX
Over 1,000 Posts
Double-checked it, and it was, as Chumma claimed, mildly retarded (like the customer) as he sent it to me set up for initial startup and break-in.
I tried everything from full retard to full advance. Nada help. Same with the air bleed screw.
After a phone conversation (been on with him at least an hour a night lately) we think it's at least partly the gas, and he is sending me both richer pilot jets and a Hitchcock variable timing gear.
I tried everything from full retard to full advance. Nada help. Same with the air bleed screw.
After a phone conversation (been on with him at least an hour a night lately) we think it's at least partly the gas, and he is sending me both richer pilot jets and a Hitchcock variable timing gear.
AgentX
Over 1,000 Posts
The kickback isn't from advance--it's from opening the throttle during the kick. (Per Chumma, that's normal, and he wants hands-off the throttle on startup once it's running properly. I thought it was advance, too, as you can see from my initial post about it on the Enfield site...said I'd try retarding it.)
High On Octane
Ton Up or Shut Up
Here's the deal, Indian gas is kind of crappy as you know and is more prone to detonation. If you can't retard the timing anymore then you may need to add some base gaskets under the cylinder. Have you tested the compression yet?
Weldangrind
Quae nocent, docent
I wouldn't be surprised if richer idle jets cure the issue for you.
AgentX
Over 1,000 Posts
High On Octane said:
Wow, African gas must be like 10x as bad, then.
Seriously, though, I was unaware there were two different systems of rating octane. What we have is "91" but apparently corresponds to a lower equivalent rating in the US. I'm looking at toulene or some other additive I can use to boost octane.
Chumma thinks the variable timing pinion may be able to help reduce compression so a base gasket isn't needed, but we've discussed it.
AgentX
Over 1,000 Posts
Hey, lookit this:
https://www.youtube.com/watch?v=qciokt-2Y6Q
I managed to get a short blast around the 'hood! Open header had people covering their ears as I passed. Did my best to load the rings for bedding-in...
This thing is amazing compared to the stock bike. Pulls like a mule. The guys at Ace know what they're doing on these. If you've got an Enfield, it needs to see them. (The same guys doing High on Octane's land speed twin...)
https://www.youtube.com/watch?v=qciokt-2Y6Q
I managed to get a short blast around the 'hood! Open header had people covering their ears as I passed. Did my best to load the rings for bedding-in...
This thing is amazing compared to the stock bike. Pulls like a mule. The guys at Ace know what they're doing on these. If you've got an Enfield, it needs to see them. (The same guys doing High on Octane's land speed twin...)
That's the shit!
Weldangrind
Quae nocent, docent
AgentX said:
I'm unfamiliar with that carb, but it sounds like it is designed more like a typical two-stroke carb, where the screw meters air rather than fuel. If so, it makes sense that it would begin to idle with the air screw fully turned in, if the idle jets are too small. Do I understand that correctly?
It sounds awesome, BTW. 8)
AgentX
Over 1,000 Posts
So, yesterday. Aka "to fab a header." Or, "Picker's Paradise."
Rented a whole local taxi-van (SoTraMa in the local vernacular) to get the bike to a workshop recommended by a local colleague.
Rented a whole local taxi-van (SoTraMa in the local vernacular) to get the bike to a workshop recommended by a local colleague.
Attachments
AgentX
Over 1,000 Posts
First guys were a bit confounded.
We ended up having to go look for raw materials. Turns out that's not really available (although I think we could have tried to find a new exhaust off a hilux to mutilate...). So we ransacked junkyards and bike shops. I will let the photos speak.
Exhausts don't grow on trees. Or do they?
We ended up having to go look for raw materials. Turns out that's not really available (although I think we could have tried to find a new exhaust off a hilux to mutilate...). So we ransacked junkyards and bike shops. I will let the photos speak.
Exhausts don't grow on trees. Or do they?
Attachments
AgentX
Over 1,000 Posts
In the end, there was nothing we could find in all that. Lots of structural pipe, pressed junk from mopeds, etc. Nothing appropriate for my header. So we chopped up the stock header to prototype something while I order some decent mild steel bends.
No one could really bend the pipe locally. There are guys who will sand-fill and heat bend, but their work is even sketchier than what we finally did. I realize it isn't ideal but it is a prototype for now. Slotted the pipe, bent into position, and tacked it up, then they booger-welded and ground the shit out of it.
Safety first, boys! And remember, no ashing your cigarette on your friend's head as he uses the cutting wheel, and all that fave and foot protection is dangerously cumbersome. But use the fake oakleys to protect your eyes while welding at least half the time, and be sure to share the one set with the other welders so everyone gets a turn.
No one could really bend the pipe locally. There are guys who will sand-fill and heat bend, but their work is even sketchier than what we finally did. I realize it isn't ideal but it is a prototype for now. Slotted the pipe, bent into position, and tacked it up, then they booger-welded and ground the shit out of it.
Safety first, boys! And remember, no ashing your cigarette on your friend's head as he uses the cutting wheel, and all that fave and foot protection is dangerously cumbersome. But use the fake oakleys to protect your eyes while welding at least half the time, and be sure to share the one set with the other welders so everyone gets a turn.
