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TT:s in Scandinavia http://www.ducatittandf1.com/viewtopic.php?f=20&t=11837 |
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Author: | 618F1 [ Sat Apr 27, 2019 9:06 pm ] |
Post subject: | Re: TT:s in Scandinavia |
I really hate to see this end. It has been fun checking in every few days to see your postings. MikeV |
Author: | ducttf1 [ Sat Apr 27, 2019 9:41 pm ] |
Post subject: | Re: TT:s in Scandinavia |
I'm with Mike! Why should it end? Start telling us your future plans and include pics! Lou |
Author: | graeme [ Sun Apr 28, 2019 5:35 pm ] |
Post subject: | Re: TT:s in Scandinavia |
What engine did Gilera use in the Piuma ? |
Author: | piuma14 [ Mon Apr 29, 2019 2:22 pm ] |
Post subject: | Re: TT:s in Scandinavia |
Dont worry, I wont let you off that easy... The Piuma had a pretty standard 558cc, the same one that used in different Gilera models as various 350 offroaders, the Saturno (350 and 500cc), the Nordwest and so on. Basically a very good design, dohc with cambelt and easy to maintain and work on. Fragile yes, but then again also japanese singles broke their crankcases when power was increased with 50%. We replaced the single intake head with the later dual intake from the Nordwest, bigger valves from Kawasaki KLX650R, double Dellorto 36mm, camshafts from Grosewächter, a 9mm longer conrod from Autoverdi and a 104mm piston from Wahl in a iron lined outbored original cylinder. We were very happy with the 72hp, but the Yamaha XTZ:s made easily 80 and the BMW:s as easily 90... I will try to push my F1 to be ready for next year, and will report about that and I have started to collect parts for a TT1 replica. Picked up the Alazurra heads last week, not much to start with but maybe the most important and hardest to find pieces! I have a dream garage consisting of the Piuma, a TT1 and an Aprilia RSW250. One is in place, the second in my mind but the third one is unobtainable for me. But I might slip in some words and pics of my surrogate, a Harris with a Rotax 250 tandem (so at least a 250 GP racer!) Or is that too off topic? /Björn |
Author: | Cal [ Tue Apr 30, 2019 9:51 am ] |
Post subject: | Re: TT:s in Scandinavia |
That's on topic to me.....bring on the Harris/Rotax !! Clay |
Author: | piuma14 [ Sun May 05, 2019 10:48 am ] | |||
Post subject: | Re: TT:s in Scandinavia | |||
And how do you get around finding the engine for such a bike, without feeding the sellers in southern Europe thousands of euros? Simple: Superkart is dying, so there are some cheap complete karts for sale, most of them with the Rotax tandem 250 engine. You buy the complete kart, strip it and sell the complete chassi to a kart enthusiast. The engine has costed me 20-25 of what the bare engines sometimes are advertised for. Yes it might be worn, and have a different spec than an engine coming from a racing motorcycle, but who has ever bought a used racing engine without need for renovation? tbc /Björn
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Author: | piuma14 [ Thu May 16, 2019 2:21 pm ] | ||||
Post subject: | Re: TT:s in Scandinavia | ||||
While waiting for my Harris frame to be ready I am fortunate enough to borrow an ESW chassis for the Rotax tandem twin from a friend who doesnt use it. This meant I could test my own engine, which was handy as it turned out to need an overhaul. ESW stands for Eksjö Special Welding and is run by Erik Lundin. He was a 250 racer, and in the early 80:s not happy with the TZ frames. He started producing his own, mainly for TZ engines but also for Rotax. First in square tubes and later beams, but all in aluminum. He has also done two frames in round steel tubes for single cylinder fourstrokes, one Rotax ohc and one Husqvarna 510 that was shown in Husqvarnas booth at the exhibition in Milan. Could it have been 1984? Several years up to the end of the 80:s ESW framed 250:s totally dominated the podiums in our national championship. At that point the Honda RS was established and the TZ had a frame that actually worked. Over and out! /Björn
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Author: | DymokeDucati [ Thu Oct 03, 2019 8:12 pm ] |
Post subject: | Re: TT:s in Scandinavi |
piuma14 wrote: Previous picture wa taken at Snetterton in UK in 1987 (if I remember correct). A delegation from my club at the time visited the race to study ahead of the first BoTT tace in Sweden which I have touched before.
Not only strange-looking bikes from Sports Motorcylcles was there, also nice-looking. They entered a DB1 in the race piloted by a journalist from Performance Bikes. Mark Forsythe I think his name was. I dont know the history behind, if it was a modified standard bike or ine of the rare DB1r:s. Does anyone know? Back to strange British design: at the time I had no idea what it was but after seeing the ad on the web last year I realised it was a Maxton I had spotted. Last before Brexit: the bike standing in Harris Performance office, 2018. /Björn |
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