Overgrown Offroad Zombie - Page 7

larryboy · 10-01-2011, 06:20 PM

The more I look at it...I think I need to add one of these on each side, there is room under the seat since I shimmed the front about 1/2" higher.

UngaWunga · 10-03-2011, 04:34 AM

it might be more important to have a tube go to the bottom of the headstock to prevent it from twisting when cornering/braking.

larryboy · 10-03-2011, 09:17 AM

It's tied in at four places on the front, nothing else I can do there, besides...there aren't twisting forces there. I've done much more than any other conversion I've seen, it's safe.

Pretty much the only thing I could do to add any strength is do make sheetmetal panels to fill the spaces between the tubing and dimple die them.

toastmuncher · 10-03-2011, 09:19 AM

Sorry fella but what does dimple die mean?

larryboy · 10-03-2011, 09:22 AM

It takes speed holes and makes them strong, very common in roll cages and race cars/trucks.

Here's how they do it:

larryboy · 10-03-2011, 11:59 AM

Ok, things are really coming together now!!

Igintion box from Germany has arrived. Much thanks to Poolside and Volker for figuring out what I need!!

Battery from herrhelmet here on the board arrived too, hard to believe that little thing has 410 CCA's.

Much thanks goes to Chad at Sudco for helping me pick out the right carb flange for my application. Unfortunate that they are out of stock, forced me to order from an ebay'er...time crunch, it won't break Sudco...hate to "use" them for the part number and expertise, but whaddya gonna do?

, just noticed my silly concert bracelet in the picture. I am completely destroyed from a night of pushing and shoving, gawd, what fun!!

larryboy · 10-03-2011, 01:01 PM

The timing box came with Kurven diagrams, 9 different settings. I had to look up "frühzündung", timing advance curve I think. I would probably benefit from some dyno tuning to see what curve is best?

mike-s · 10-03-2011, 08:33 PM

Quote:

Originally Posted by UngaWunga

it might be more important to have a tube go to the bottom of the headstock to prevent it from twisting when cornering/braking.

Is this what you had in mind?

?

larryboy · 10-03-2011, 11:01 PM

Quote:

Originally Posted by mike-s

Is this what you had in mind?

?

There is already a mid tube that serves the same function as what you drew in.

Here is what others have done, probably safe, but I've gone well beyond this example as I know myself and how I ride. I've more than doubled the strength of what you see here:

mike-s · 10-04-2011, 05:34 AM

That's cool, i was just trying to make sure i interpreted the suggestion correctly. It was a bit for you and also a bit for me to try and help my understanding of these things a little better.

MotoKaw · 10-04-2011, 07:36 AM

Looks good Larryboy. Yours looks roughly analogous to the HP2 trelllis. Keep up the pace, I'm following along to make one of my own soon based on an wrecked R1100RT. - Bob

larryboy · 10-04-2011, 11:24 PM

Thanks for the ideas, guys.

It all helps!! My main goal is safety and a margin of that.

Talking out loud, I think all the major stuff is inbound or here already. I haven't finalized the oil cool mounting yet and it looks like it will have to go on the forks below the headlights, so I might have to come up with a couple swivel fittings from Aeroquip to make that work right.

Garthe · 10-04-2011, 11:39 PM

Off topic, I'm a former HP 2 owner. It always bugged me that BMW had the sub-frame welded to the main frame. That bike was supposed to be a 'race bike'

. They love to brag about their engineering. Then they pull a stunt like that, just to sell frames.

larryboy · 10-05-2011, 07:39 AM

Quote:

Originally Posted by Garthe

Off topic, I'm a former HP 2 owner. It always bugged me that BMW had the sub-frame welded to the main frame. That bike was supposed to be a 'race bike'

. They love to brag about their engineering. Then they pull a stunt like that, just to sell frames.

Cheaper to buy your own welder for repairs.

Garthe · 10-05-2011, 11:38 AM

Quote:

Originally Posted by larryboy

Cheaper to buy your own welder for repairs.

You havn't seen my welding skills

...

My fix was selling the bike and buying another XRR

.

10-03-2011, 04:34 AM	#92
UngaWunga Mosquito bait Joined: Jan 2005 Location: NH Oddometer: 5,492	it might be more important to have a tube go to the bottom of the headstock to prevent it from twisting when cornering/braking. __________________ "There isn't any secret," he said. "It's all very obvious."

10-03-2011, 09:19 AM	#94
toastmuncher I be new round here! Ello Joined: Jan 2009 Location: Chepstow, South Wales, UK Oddometer: 617	Sorry fella but what does dimple die mean? __________________ Guzzi 1100 callifornia stone 2003 Guzzi 1100 california hedingham hack 1994 Ducati GT1000 2006 Suzuki GN250 hack, 'the tiddler' Matchless g3ls 350 1954 and AJS Model 14 250 1961. IBA 40526

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10-01-2011, 06:20 PM	#91
larryboy ^OP Paint it black. Joined: Jan 2005 Location: Über Alles,Ca Oddometer: 12,863	The more I look at it...I think I need to add one of these on each side, there is room under the seat since I shimmed the front about 1/2" higher.

10-03-2011, 09:17 AM	#93
larryboy ^OP Paint it black. Joined: Jan 2005 Location: Über Alles,Ca Oddometer: 12,863	It's tied in at four places on the front, nothing else I can do there, besides...there aren't twisting forces there. I've done much more than any other conversion I've seen, it's safe. Pretty much the only thing I could do to add any strength is do make sheetmetal panels to fill the spaces between the tubing and dimple die them.

10-03-2011, 09:22 AM	#95
larryboy ^OP Paint it black. Joined: Jan 2005 Location: Über Alles,Ca Oddometer: 12,863	It takes speed holes and makes them strong, very common in roll cages and race cars/trucks. Here's how they do it:

10-03-2011, 11:59 AM	#96
larryboy ^OP Paint it black. Joined: Jan 2005 Location: Über Alles,Ca Oddometer: 12,863	Ok, things are really coming together now!! Igintion box from Germany has arrived. Much thanks to Poolside and Volker for figuring out what I need!! Battery from herrhelmet here on the board arrived too, hard to believe that little thing has 410 CCA's. Much thanks goes to Chad at Sudco for helping me pick out the right carb flange for my application. Unfortunate that they are out of stock, forced me to order from an ebay'er...time crunch, it won't break Sudco...hate to "use" them for the part number and expertise, but whaddya gonna do? , just noticed my silly concert bracelet in the picture. I am completely destroyed from a night of pushing and shoving, gawd, what fun!!

10-03-2011, 01:01 PM	#97
larryboy ^OP Paint it black. Joined: Jan 2005 Location: Über Alles,Ca Oddometer: 12,863	The timing box came with Kurven diagrams, 9 different settings. I had to look up "frühzündung", timing advance curve I think. I would probably benefit from some dyno tuning to see what curve is best?

10-04-2011, 05:34 AM	#100
mike-s 2 squeaky wheels Joined: Jun 2007 Location: Sydney, Aus Oddometer: 609	That's cool, i was just trying to make sure i interpreted the suggestion correctly. It was a bit for you and also a bit for me to try and help my understanding of these things a little better.

10-04-2011, 07:36 AM	#101
MotoKaw Gnarly Adventurer Joined: Nov 2005 Location: Detroit 'burbs Oddometer: 160	Looks good Larryboy. Yours looks roughly analogous to the HP2 trelllis. Keep up the pace, I'm following along to make one of my own soon based on an wrecked R1100RT. - Bob

10-04-2011, 11:24 PM	#102
larryboy ^OP Paint it black. Joined: Jan 2005 Location: Über Alles,Ca Oddometer: 12,863	Thanks for the ideas, guys. It all helps!! My main goal is safety and a margin of that. Talking out loud, I think all the major stuff is inbound or here already. I haven't finalized the oil cool mounting yet and it looks like it will have to go on the forks below the headlights, so I might have to come up with a couple swivel fittings from Aeroquip to make that work right.

10-04-2011, 11:39 PM	#103
Garthe ROCKS ARE YOUR FRIENDS... Joined: Nov 2004 Location: USA Oddometer: 4,115	Off topic, I'm a former HP 2 owner. It always bugged me that BMW had the sub-frame welded to the main frame. That bike was supposed to be a 'race bike' . They love to brag about their engineering. Then they pull a stunt like that, just to sell frames.