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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #21  
Old 1 Week Ago
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
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Yes, this one looks the business.

And I can appreciate the time spent getting this bike to this standard. Most of us get 95% of the way there and say "Near enough is good enough".
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  #22  
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cazz1000 cazz1000 is online now
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still ,, trying,,,,, too get there, im close but ,,, no where near,,,,, good head job ,,, Andrews ,, r5,s,, nice carb,,,,, good compression ,, 150 psi and above,, nice,,, u did very very good
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  #23  
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rg500 rg500 is offline
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Sportster/Buell Model: XLH
Sportster/Buell Year: 1971
Sportster/Buell Model #2: XLH
Sportster/Buell Year #2: 1978
Other Motorcycle Model: XLCH
Other Motorcycle Year: 1971
Reputation: 6909
rg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nice
Default Yes amazed fun to drive



Some more info of the bike:
Gearbox: Andrews C-ratio (26T/18T), 23 front drive sprocket / 51 rear sprocket
Clutch: Barnett Scorpion
Shock Absorber: K-TECH RAZOR LITE 14 1/2 built by FJ Racing Suspension
Front fork: Showa 35 mm with Race Tech gold valve and Progressive Suspension springs
Brakes: Front original brake / 10 inch discs (which works really well after some work) and rear the original drum
Front wheel: Original 19 / 2.50 Borrani, Avon Roadrider 90 / 90-19
Rear wheel: Original 18 / 2.50 Borrani, Avon Roadrider 120 / 80-18
Saddle: Modified Mustang saddle
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  #24  
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2 things stick out to me

It will never reach full potential without dual spark plugs.

And progressive springs suck, ask any race setup guy. Progressive springs waste suspension travel (that it is already short on).

Looks very nice and I approve of the exhaust.
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  #25  
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How do progressive springs work on the road? If this is mainly a road bike they may be appropriate. Not my area of expertise, just curious.
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  #26  
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rg500 rg500 is offline
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Sportster/Buell Model: XLH
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rg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nice
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The fork feels a little hard at lower speeds, but if you start driving inspired it works really well, took a while with different fork oils and pre settings on the springs before I was satisfied.
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  #27  
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I LOVE it!!!
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  #28  
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I'm guessing you have some track time on the RG and either you or your suspension guy would have sorted it.

The stock suspension and brakes are rubbish. The tubes are just way too small to start with. But we ride to the conditions.

I watched a guy do an endo on an RG500 a couple of years ago at Mac Park. Not sure why he threw it away like he did but suspect he just gassed it up way too early. He was half way down a short straight. We all felt very bad for him when we saw the damage. Triple trees were broken. Tank seat, just about everything.

I have a bone stock 74. It has less than 5,000 miles on it. I love it. Sister bike to one I bought nearly 45 years ago. I won't "improve it" because it's a time traveler. But I do like what you've done.
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  #29  
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rg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nicerg500 is just really nice
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Yes I have had an RG that I run on track days, it was updated with Öhlins suspension, 17 inch rims and modern brakes and tune engine. The only thing that was not updated was the driver, it was fun and at the same time a bit dangerous, the younger drivers with newer bikes had a hard time understanding that such old bike could run as it did. Sold a year ago, the prices of them are starting to get ridiculous here. I have kept an RGV 250 for track days.
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  #30  
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Ah Ha !

I'm thinking now that what you have is a Gamma ? The road version ?

We have a couple of guys here that race the factory RG500's from the early 70's (1982 ?)

Those are worth around the $100K mark now and to see one so thoroughly trashed is a rare event these days. Spares are VERY hard to come by.

Maybe it's time you took up Historic racing ? Guys your own age with bikes of your vintage.

Sorry, I presume your over the age of 35 as your working on Ironheads.
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