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Search: Posts Made By: Sporticus
Forum: The Board 03-01-2020, 09:37 PM
Replies: 905
Views: 557,325
Posted By Sporticus
Re: show me your flat trackers and desert racers

https://www.youtube.com/watch?v=5qtZ4aCQhQg
Forum: The Board 02-25-2020, 09:57 PM
Replies: 7
Views: 802
Posted By Sporticus
Re: Ironhead. What would you do?

Many will argue you have the best iron head frame built - very similar to the factory XR frame that ended production in 1980. If you build it to its 1979 incarnation, then you'll have issues finding...
Forum: The Board 02-25-2020, 09:48 PM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

Thanks Hank. When I first started this project, I intended to build the same rolling chassis but with a warmed over ironhead engine. I started a post about it here and you mentioned your experience...
Forum: The Board 02-24-2020, 10:23 PM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

Thank you Patrick! I went to save this, and realized I already had it in the dark recesses of my computer but had completely forgotten about it. The rockers won't be my next sub-project, but will be...
Forum: The Board 02-24-2020, 07:57 AM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

Regarding the frame, based on a bunch of things, I'm sending my frame off to have the cast area removed, and reworked XR style with 26 degrees of rake and a lower neck. It'll handle much less like a...
Forum: The Board 02-22-2020, 10:40 PM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

Thanks. The rocker boxes were made from scratch by the guy I bought the heads and cylinders from. He put a huge amount of work into them. I can see there was a lot of welding and grinding involved....
Forum: The Board 02-13-2020, 07:42 PM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

Patrick's post got me thinking, and then I saw these photos on the interwebs. These photos show an 1980-81 XL frame next to a factory XR750 frame (frame with cast neck is XL). The frames look...
Forum: The Board 02-12-2020, 08:19 PM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

I should have mentioned the crank. I'm using ironhead flywheels and Evo rods, which as you mention are the same length as XR1000 rods. Same crankpin diameter, just 6.926" center to center as compared...
Forum: The Board 02-12-2020, 08:09 AM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

Thanks Patrick. It's an '81 frame - does that make any difference? I'm really hoping the 14" shocks and much shorter forks make it handle a bit less like a freight train. I got in touch with Keenan...
Forum: The Board 02-11-2020, 08:36 PM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

Nikasil has worked very well for Guzzis, though I have heard stories of it peeling off in early bikes. I had a '75 850T and the cylinder walls looked beautiful on it, with no signs of peeling. The...
Forum: The Board 02-10-2020, 06:14 PM
Replies: 22
Views: 2,081
Posted By Sporticus
Re: XL/XR hybrid mutt

Thanks Elektron. Yes, that's a Guzzi V11 LeMans. It runs great and does everything I ask of it because I don't mess with it. I change the oil, get it new tires occasionally, and leave it alone. It...
Forum: The Board 02-09-2020, 09:57 PM
Replies: 22
Views: 2,081
Posted By Sporticus
XL/XR hybrid mutt

Since I was bashing on the JJ in a recent thread, I thought I should contribute something. This is a project not typical of the JJ, but I hope you find it interesting. I've posted in an another forum...
Forum: The Board 02-06-2020, 08:07 PM
Replies: 60
Views: 3,391
Posted By Sporticus
Re: Norton or how to not behave...

I don't ever remember seeing that stuff on the JJ. Maybe I wasn't paying attention?
Forum: The Board 02-03-2020, 05:00 PM
Replies: 60
Views: 3,391
Posted By Sporticus
Re: Norton or how to not behave...

This may be considered off-topic, but I don't think comments about a particular forum can be off-topic when posted on that forum. I agree that social media (Facebook, etc.) has strongly impacted many...
Forum: The Board 02-02-2020, 08:56 PM
Replies: 60
Views: 3,391
Posted By Sporticus
Re: Norton or how to not behave...

I was once one of the thousands, and occasionally one of the hundreds. I couldn't have said it better than Jason. I check back from time to time to make sure I'm not missing anything interesting....
Forum: The Board 09-16-2019, 12:03 PM
Replies: 18
Views: 1,920
Posted By Sporticus
Re: Harley big twins? WTF is a "little twin'? (novel)

This site has a number of valve spring dimensions listed - it's where I got the dimensions for the 427 spring. There weren't a lot of springs with a large enough ID to fit around the 45 seat post. I...
Forum: The Board 09-15-2019, 09:20 AM
Replies: 18
Views: 1,920
Posted By Sporticus
Re: Harley big twins? WTF is a "little twin'? (novel)

Second what Scott said about the front drum. My former 45 has/had a Honda CB350 front drum which was fine, I never tried the Sportster drum, though. A few observations - I had this on both the track...
Forum: The Board 05-28-2019, 12:17 PM
Replies: 23
Views: 2,319
Posted By Sporticus
Re: Hunt magneto for '71 and up Sportsters

This is the article that Ratso was referring to. Sorry for the less-than-ideal scanning. Keep clicking on the page to get to the next page, or something like that.


<iframe allowfullscreen="true"...
Forum: The Board 05-22-2019, 09:49 PM
Replies: 23
Views: 2,319
Posted By Sporticus
Re: Hunt magneto for '71 and up Sportsters

Check your private messages.
Forum: The Board 05-22-2019, 12:54 PM
Replies: 23
Views: 2,319
Posted By Sporticus
Re: Hunt magneto for '71 and up Sportsters

I wish there was a solid state, self-powered ignition available for the ironhead. There simply isn't. I've searched, but I'd love to be proven wrong. The two manufacturers listed by denisj don't list...
Forum: The Board 05-20-2019, 02:11 PM
Replies: 23
Views: 2,319
Posted By Sporticus
Re: Hunt magneto for '71 and up Sportsters

DenisJ - thanks for that. Your experience is what I was afraid of. Yes, there are plenty of ignitions better suited for this than a stone age magneto. They all require batteries, and I despise...
Forum: The Board 05-18-2019, 08:37 PM
Replies: 23
Views: 2,319
Posted By Sporticus
Re: Hunt magneto for '71 and up Sportsters

Oh, that's not what I wanted to hear. Did it keep going out of time? Morris makes a mag w/impulse coupler that goes in the genny hole for $1695.
Forum: The Board 05-18-2019, 08:53 AM
Replies: 23
Views: 2,319
Posted By Sporticus
Re: Hunt magneto for '71 and up Sportsters

USCRA Supervintage (through 1972). I proposed a rule change that got accepted, making all 1000 ironheads eligible for the class.


Ratso - you are correct. I got the sag set but haven't ridden it...
Forum: The Board 05-17-2019, 08:37 PM
Replies: 23
Views: 2,319
Posted By Sporticus
Re: Hunt magneto for '71 and up Sportsters

Thanks. Oh, it will definitely shake parts, or at least try to. Lots of safety wire and loctite should keep me together. It's a vintage class roadracer that I was able to squeeze into the '72 and...
Forum: The Board 05-17-2019, 08:46 AM
Replies: 23
Views: 2,319
Posted By Sporticus
Re: Hunt magneto for '71 and up Sportsters

I agree that the 900 cover looks better. I read an old write up on here about adapting one to a later ironhead. It looked like more than I wanted to get involved in, or the write up made it seem that...
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