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Search: Posts Made By: GrayJay
Showing results 1 to 33 of 33
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Forum: Framebuilders
04-08-24, 11:40 PM
Replies: 13
Views: 566
Posted By GrayJay

Aluminum tube welding repair is really only...

Aluminum tube welding repair is really only practical on 7005 or other "naturally aged" alu metallurgy. Majority of commercial aluminum frames use 6061-T6 with T6 heat treating needed to restore...
Forum: Classic & Vintage
12-08-23, 12:14 PM
Replies: 6
Views: 359
Posted By GrayJay

Keep in mind too, if replacement rims are...

Keep in mind too, if replacement rims are slightly different ERD you might be able to compensate by changing spoke lacing pattern and still re-use same length spokes. Example might be going from 3x...
Forum: Framebuilders
11-26-23, 01:00 PM
Replies: 13
Views: 824
Posted By GrayJay

Entirely do-able using brazing and an oxy/propane...

Entirely do-able using brazing and an oxy/propane torch assuming frame was originally brazed and not TIG welded.
The only caution I would have is that if your using the small disposable O2 canisters...
Forum: Framebuilders
10-27-23, 01:17 PM
Replies: 8
Views: 751
Posted By GrayJay

Watch some of the tutorial videos at; ...

Watch some of the tutorial videos at;
https://www.youtube.com/@easycompositestv/videos
Their compression molding of chopped fibers might be particularly useful if you are making small, solid parts...
Forum: Framebuilders
08-24-23, 01:26 PM
Replies: 10
Views: 1,003
Posted By GrayJay

Strange looking cracks. If this were a stress...

Strange looking cracks. If this were a stress crack from use/fatigue then it would more likely run radial around the tube, instead of along the tube axis length. Might be that the seatstay tubing was...
Forum: Classic & Vintage
08-18-23, 01:45 PM
Replies: 13
Views: 1,019
Posted By GrayJay

Henk's bike and Panasonic team kit brings back...

Henk's bike and Panasonic team kit brings back memories for me. In 1990 I was 20 yrs old embarked on a solo European bike tour for the summer, staying at youth hostiles and B&B rooms along the way. I...
Forum: Classic & Vintage
07-21-23, 11:12 AM
Replies: 17
Views: 771
Posted By GrayJay

I would not have any concern that the aluminum...

I would not have any concern that the aluminum fork would be prone to a sudden failure simply due to its age. I would be more worried if it was known to have massively high miles of hard riding or...
Forum: Classic & Vintage
07-19-23, 03:15 PM
Replies: 29
Views: 1,292
Posted By GrayJay

Axle will bend/break from rider weight and riding...

Axle will bend/break from rider weight and riding over bumps, not from using small cog. You need to extend the axle spacers to make the 8sp FW work but when used with a threaded axle and loose ball &...
Forum: Classic & Vintage
07-18-23, 01:36 PM
Replies: 2
Views: 315
Posted By GrayJay

Cut some 1" x 12" plastic strips from an old...

Cut some 1" x 12" plastic strips from an old 5-gallon plastic bucket. Use a propane torch to light one end of the strip on fire and use the dripping molten plastic candle to "weld" the cracked wheel...
Forum: Classic & Vintage
07-18-23, 01:07 PM
Replies: 17
Views: 1,089
Posted By GrayJay

Amazing set of photos. The online album just...

Amazing set of photos. The online album just need the addition of sound effects from a slide projector carousel advancing with each new photo!
Forum: Framebuilders
07-16-23, 10:06 PM
Replies: 22
Views: 1,744
Posted By GrayJay

If the front triangle is known as more or less...

If the front triangle is known as more or less strait, you can take a thin string or fishing line; tie to end to a rear dropout, loop string around headtube and then back to opposite dropout. You...
Forum: Framebuilders
07-14-23, 05:11 PM
Replies: 13
Views: 1,565
Posted By GrayJay

Might be possible to CAREFULLY drill a hole...

Might be possible to CAREFULLY drill a hole through the exposed face of the drop-out (or tube cap) that covers over the lower end of the dented seatstay. Start with a smaller hole that is...
Forum: Classic & Vintage
07-06-23, 07:02 PM
Replies: 29
Views: 907
Posted By GrayJay

You do know that the internal expansion hex-bolt...

You do know that the internal expansion hex-bolt is left hand thread, clockwise to loosen?
Hold the protruding part of the pod with crescent wrench on flat sides. You could also sacrifice the...
Forum: Framebuilders
06-16-23, 07:14 PM
Replies: 22
Views: 1,744
Posted By GrayJay

Looks salvageable. They likely used a dremmel or...

Looks salvageable. They likely used a dremmel or some other overly aggressive grinder wheel to obliterate the top tube guides. Not ideal but the top tube is not very stressed so it will likely be...
Forum: Classic & Vintage
02-25-23, 11:43 AM
Replies: 48
Views: 2,818
Posted By GrayJay

Decades ago while I was road racing, I obtained...

Decades ago while I was road racing, I obtained an unusual wide spacing 6-speed winner freewheel with an 11t small cog. It was from the X position cog on the chart and screwed onto outboard threads...
Forum: Classic & Vintage
01-18-23, 02:44 PM
Replies: 46
Views: 2,634
Posted By GrayJay

In early 90's tubing supplier Columbus was...

In early 90's tubing supplier Columbus was fabricating and supplying complete unicrown forks that some frame manufactures used. They had columbus stamping on the drop-outs and on the fork steer tube...
Forum: Classic & Vintage
10-03-22, 01:27 AM
Replies: 27
Views: 1,310
Posted By GrayJay

The stem mounted shifters and the turkey brake...

The stem mounted shifters and the turkey brake levers were likely original to this bike. The lowest spec technium models came with these to appeal to entry level recreational riders as seen in this...
Forum: Classic & Vintage
10-01-22, 09:59 AM
Replies: 27
Views: 1,310
Posted By GrayJay

Those brake levers are cheap garbage, probably...

Those brake levers are cheap garbage, probably harvested of same huffy bike that supplied the heavy steel wheel. Replacement of the brake levers will improve braking. If you go to 700c rims, you will...
Forum: Classic & Vintage
08-22-22, 09:52 AM
Replies: 38
Views: 1,919
Posted By GrayJay

Clamp the flat inner portion of the FW in a fixed...

Clamp the flat inner portion of the FW in a fixed bench vise and then apply counter-clockwise force at two opposite sides of the rim (like a big bus steering wheel). The coupled force (at the rim)...
Forum: Classic & Vintage
08-02-22, 11:11 AM
Replies: 17
Views: 820
Posted By GrayJay

Suntour bar-ends will work fine with vintage...

Suntour bar-ends will work fine with vintage campy. The suntour micro-ratchet bar ends are a great design, the ratchets help counter-act the cable/spring tension of the rear derailleur so less...
Forum: Classic & Vintage
07-11-22, 11:53 AM
Replies: 16
Views: 1,058
Posted By GrayJay

In 1990 I was train/bike touring Europe and spent...

In 1990 I was train/bike touring Europe and spent a few days watching my first pro bike race in person, following the Tour of Switzerland for a few days. In the evening after one of the stages, I...
Forum: Framebuilders
05-24-22, 05:30 PM
Replies: 21
Views: 1,903
Posted By GrayJay

Not entirely sure what alloy "x-fusion quaternary...

Not entirely sure what alloy "x-fusion quaternary aluminum" actually is, but I did see that some other alu fuji bikes from that era listed as 7005 series which can be TIG welded without needling...
Forum: Framebuilders
01-21-22, 12:33 AM
Replies: 8
Views: 1,313
Posted By GrayJay

If objective is to lengthen a short steer tube,...

If objective is to lengthen a short steer tube, consider cutting the existing ST above the crown and splicing in a longer ST with an interval sleeve reinforcing the splice. Other option might be to...
Forum: Framebuilders
11-04-21, 03:17 PM
Replies: 18
Views: 3,638
Posted By GrayJay

I saw another source citing the 1200 model as...

I saw another source citing the 1200 model as using easton tubing, might be that Trek changed tubing suppliers for the 1200 throughout the years?
Reason for all the bonding and rivets is that it...
Forum: Framebuilders
11-04-21, 02:08 PM
Replies: 11
Views: 2,082
Posted By GrayJay

Stick welding would work great for a frame built...

Stick welding would work great for a frame built out of steel rebar material!
https://pin.it/4ZS1Rmv
Forum: Framebuilders
09-18-21, 10:58 AM
Replies: 4
Views: 773
Posted By GrayJay

Fix would require un-brazing the bent fork legs...

Fix would require un-brazing the bent fork legs from the crown, replace with new legs. While it is possible, unless you can do the work yourself, probably more economical to just find a different...
Forum: Framebuilders
09-16-21, 05:46 PM
Replies: 8
Views: 993
Posted By GrayJay

Mock-up the joint with tubes in the lugs an...

Mock-up the joint with tubes in the lugs an measure the angle of the protruding tubes. Most lugs will have a bit of slop in the fit to the tube so it is not exactly a high-precision measurement.
Forum: Classic & Vintage
05-19-21, 01:05 PM
Replies: 25
Views: 1,865
Posted By GrayJay

If the boss is not terribly bent and can be...

If the boss is not terribly bent and can be re-used, you can likely find a local (non-framebuilder) welder do the fix. Get a small piece of flat bar steel and drill 2 holes at the same spacing of the...
Forum: Framebuilders
04-30-21, 04:18 PM
Replies: 17
Views: 3,439
Posted By GrayJay

In one of the old Jack Taylor documentary films,...

In one of the old Jack Taylor documentary films, they explain that the secret for hand-brush pin striping is to first go over to the neighboring pub and get a shot of strong whiskey to steady the...
Forum: Framebuilders
12-23-20, 06:19 PM
Replies: 27
Views: 3,585
Posted By GrayJay

Rather than welder tacking, traditional lug...

Rather than welder tacking, traditional lug framebuilding method is to lay on the aligned frame tubes, drill 3 small holes piercing through the lug and tube where they overlap then hammer/tap a small...
Forum: Classic & Vintage
05-29-13, 04:54 PM
Replies: 17
Views: 3,117
Posted By GrayJay

Two DIY options - Chuck your 1-1/8" headset in a...

Two DIY options - Chuck your 1-1/8" headset in a lathe and turn it down enough to press-fit in the headtube like the retroryder, or ream the headtube out to 34mm ID to permanently convert the frame...
Forum: Classic & Vintage
08-29-11, 06:07 PM
Replies: 37
Views: 5,191
Posted By GrayJay

+1 It is definitly 1st gen Athena. The crank...

+1
It is definitly 1st gen Athena. The crank bolt cover caps are a giveaway, CdA and Chorus cranks from that timeframe utilized self-extractor crank bolts....
Forum: Classic & Vintage
12-22-10, 03:02 PM
Replies: 66
Views: 17,360
Posted By GrayJay

I wouldnt hesitate to coldset the rear from 120...

I wouldnt hesitate to coldset the rear from 120 to 130 if you want a more modern drivetrain, just be sure to align the dropout afterwards as they will no longer be parallel. If you have ever seen how...
Showing results 1 to 33 of 33


 
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