DUCATI TT and F1 FORUM
 
It is currently Sat Nov 18, 2017 2:30 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 73 posts ]  Go to page 1, 2, 3, 4, 5 ... 8  Next
Author Message
 Post subject: Tribute to the Pantah F2 No. 8
PostPosted: Mon May 09, 2011 11:02 am 
Offline

Joined: Thu Oct 14, 2010 11:23 am
Posts: 1122
Well, I am working on my rendition of a tribute (I will not call it a replica, and Mr. Slinn would spot any discrepancies anyway) to the Tony Rutter/Pat Slinn/Steve Wynne Pantah racer No. 8 that was a winner at the Isle of Man. I hope to be at Barber in October with this in good running condition; we will see. Have been piling up parts as close to what it had, and what it looked like, based on the photos available, a magazine article of that time, and some help from Pat Slinn that has been posted here. Spent this weekend cutting and fitting tubing for the first time; and I will try my hand at some TIG welding soon. The heads are out for conversion to race cams and porting, and the crank, rods, and pistons should be back from balancing soon. Well, here we go (more to come later):
Attachment:
a forks Marz mag 38mm 1.jpg
a forks Marz mag 38mm 1.jpg [ 130.03 KiB | Viewed 4416 times ]
Attachment:
b IM006560.JPG
b IM006560.JPG [ 564.75 KiB | Viewed 4416 times ]
Attachment:
c IM006662.JPG
c IM006662.JPG [ 526.4 KiB | Viewed 4416 times ]
Attachment:
d IM006578.JPG
d IM006578.JPG [ 472.37 KiB | Viewed 4416 times ]
Attachment:
e IM006569.JPG
e IM006569.JPG [ 540.3 KiB | Viewed 4416 times ]
Attachment:
f frame.JPG
f frame.JPG [ 504.73 KiB | Viewed 4413 times ]
Attachment:
g IM006761.JPG
g IM006761.JPG [ 461.65 KiB | Viewed 4413 times ]
Attachment:
h IM006765.JPG
h IM006765.JPG [ 530.69 KiB | Viewed 4413 times ]


Last edited by 618F1 on Mon May 09, 2011 1:24 pm, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Mon May 09, 2011 12:23 pm 
Offline

Joined: Thu Oct 14, 2010 11:23 am
Posts: 1122
As you can see, I have moved the shock upright by moving the lower brackets forward, and moving the upper mounting point back and up---see the yellow plastic wine cork with a black mark on it---will fit a 13" Koni just fine. I did find the Newton Pantah aluminum tank in the UK---very happy with that. The rotors will be Yamaha RD 400 items trimmed and machined to resemble the Lockheed slotted versions that I have not been able to find (except when still on a TZ). And more, Addendum 1:
Attachment:
i IM006767.JPG
i IM006767.JPG [ 511.83 KiB | Viewed 4412 times ]
Attachment:
j IM006768.JPG
j IM006768.JPG [ 514.35 KiB | Viewed 4412 times ]
Attachment:
k IM006769.JPG
k IM006769.JPG [ 575.63 KiB | Viewed 4408 times ]
Attachment:
l IM006770.JPG
l IM006770.JPG [ 458.65 KiB | Viewed 4408 times ]
Attachment:
n rods factory b.JPG
n rods factory b.JPG [ 477.89 KiB | Viewed 4405 times ]
Attachment:
o P 82 2.JPG
o P 82 2.JPG [ 516.75 KiB | Viewed 4405 times ]
Attachment:
p IM006668.JPG
p IM006668.JPG [ 524.25 KiB | Viewed 4405 times ]


Attachments:
m wheel 3.JPG
m wheel 3.JPG [ 482.25 KiB | Viewed 4408 times ]
Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Mon May 09, 2011 3:00 pm 
Offline

Joined: Wed Nov 03, 2010 3:19 pm
Posts: 184
Location: Auvergne, France
frame mods like this one? ;)

Image

Image


Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Mon May 09, 2011 3:33 pm 
Offline

Joined: Thu Oct 14, 2010 11:23 am
Posts: 1122
Yes, very similar. I am cheating on the front vertical rail though. I have your photos (the complete collection, from eBay) too. Thanks, MikeV


Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Sun May 15, 2011 2:16 pm 
Offline

Joined: Thu Oct 14, 2010 11:23 am
Posts: 1122
Addenda 2: Finished the last three new tubes, and cut the corners off the axle sliders. These tubes took half the time the first set. Used a hack saw and a ROTO Zip grinder set to 20,000 RPM with grinding wheels marked "do not exceed 2500 RPM"; no shrapnel so far. Took about two hours on the axle sliders with a hack saw and file. I lost three pounds and the bike might have lost three ounces; soon I will be drilling washers like Steve Munro does. The crank will get here next week, so I can start on the lower end of the engine next. The lightened, balanced, polished crank got here today; now this is serious weight loss! And here is the frame welded up and ready to be cleaned for painting. Found out I could weld last weekend.
Attachment:
IM006771.JPG
IM006771.JPG [ 460.94 KiB | Viewed 4335 times ]
Attachment:
IM006773.JPG
IM006773.JPG [ 564.06 KiB | Viewed 4335 times ]
Attachment:
IM006774.JPG
IM006774.JPG [ 469.79 KiB | Viewed 4335 times ]
Attachment:
IM006785.JPG
IM006785.JPG [ 476.66 KiB | Viewed 4300 times ]
Attachment:
IM006784.JPG
IM006784.JPG [ 472.18 KiB | Viewed 4300 times ]
Attachment:
w2.jpg
w2.jpg [ 494.67 KiB | Viewed 4193 times ]
Attachment:
w5.jpg
w5.jpg [ 489.76 KiB | Viewed 4193 times ]


Attachments:
w7.JPG
w7.JPG [ 477.1 KiB | Viewed 4218 times ]


Last edited by 618F1 on Sat Jul 09, 2011 12:11 pm, edited 3 times in total.
Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Sun May 15, 2011 3:24 pm 
Offline

Joined: Fri Oct 15, 2010 12:20 pm
Posts: 1209
Location: Vermont, USA
Nice! I like your Ohlins box too. I've got a similar one that must be 15 years old now, and I keep it around just for jobs like the way yours is being used. Nothing props up something else with as much style as an old Ohlins box.
Bill


Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Sat Jul 09, 2011 9:44 am 
Offline

Joined: Thu Oct 14, 2010 11:23 am
Posts: 1122
Addenda 3: Got the bottom end together, and all is well. The ported heads, now with 35 and 41mm valves, arrived and they will be attached next. This is where I start to get excited. The heads went well, including twisting and re-welding the front manifold so that carb will clear. Finally got the nerve to take out the hack saw and bend the exhaust upward as on the original No. 8. Welding this thin stuff was a good humility lesson though; just when I thought I could weld---but it all worked out. I think the seat looks fine too, but have to extend it some in the front. Here are some of the lightened parts too. MikeV
Attachment:
IM006818.JPG
IM006818.JPG [ 460.36 KiB | Viewed 4203 times ]
Attachment:
IM006850.JPG
IM006850.JPG [ 514.82 KiB | Viewed 4147 times ]
Attachment:
IM006851.JPG
IM006851.JPG [ 516.89 KiB | Viewed 4147 times ]
Attachment:
IM006827.JPG
IM006827.JPG [ 532.52 KiB | Viewed 4147 times ]
Attachment:
IM006825.JPG
IM006825.JPG [ 507.43 KiB | Viewed 4144 times ]
Attachment:
gears.JPG
gears.JPG [ 508.54 KiB | Viewed 4122 times ]


Attachments:
IM006820.JPG
IM006820.JPG [ 530.13 KiB | Viewed 4202 times ]
IM006821.JPG
IM006821.JPG [ 543.76 KiB | Viewed 4203 times ]
Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Thu Jul 21, 2011 5:52 pm 
Offline

Joined: Thu Oct 14, 2010 11:23 am
Posts: 1122
Addenda 4: Well, the bottom end went together just fine; tight where it should be, loose where it can be. Good on valve-to-valve and valve-to-piston clearances too. Now it is time to tweak (degree) the cams. Now we call this phase "Prime Time", or "send them to the rack". This should be sitting on the engine, with a rolling suspension next week. Frame on the engine now. The forks turned out nice; new tubes, seals, oil, and the insides looked really good. Aug 13, AM; still waiting for the machinist to modify the brake rotors --- always "soon".
Attachment:
valve to valve clearance.JPG
valve to valve clearance.JPG [ 501.92 KiB | Viewed 4122 times ]
Attachment:
progress.JPG
progress.JPG [ 469.58 KiB | Viewed 4122 times ]
Attachment:
IM006876.JPG
IM006876.JPG [ 478.27 KiB | Viewed 4033 times ]
Attachment:
IM006879.JPG
IM006879.JPG [ 525.84 KiB | Viewed 3970 times ]
Attachment:
IM006883.JPG
IM006883.JPG [ 490.29 KiB | Viewed 3970 times ]
Attachment:
IM006887.JPG
IM006887.JPG [ 638.92 KiB | Viewed 3951 times ]
Attachment:
IM006885.JPG
IM006885.JPG [ 461.25 KiB | Viewed 3951 times ]
Attachment:
IM006902.JPG
IM006902.JPG [ 504.54 KiB | Viewed 3937 times ]


Last edited by 618F1 on Sat Aug 13, 2011 1:33 pm, edited 8 times in total.

Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Fri Jul 22, 2011 12:34 am 
Offline

Joined: Sun May 22, 2011 6:59 pm
Posts: 4
Looking real good 618F1. Your building one of my dream bikes!

What was the starting point for your motor, ie black cases and heads?


Top
 Profile  
 
 Post subject: Re: Tribute to the Pantah F2 No. 8
PostPosted: Sun Jul 24, 2011 11:54 am 
Offline

Joined: Thu Oct 14, 2010 11:23 am
Posts: 1122
Yes, the case, crankshaft, and heads are 1985 Cagiva. I have only one 1981 aluminum 500 Pantah case, trans, and heads, and I am saving those for a factory race replica later. Getting the paint off the black engine was very time-consuming; paint remover does not work, and a soda blaster does not work. The cylinders are the newer 600 parts bored to 82mm, turned down to fit the case, with the more-current cam belt rollers and adjusters; you have to fiddle around with the O-rings and the locating and oil-supply dowels, but they work just fine.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 73 posts ]  Go to page 1, 2, 3, 4, 5 ... 8  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Template made by DEVPPL