dupersunc Posted July 9, 2018 Posted July 9, 2018 (edited) So, most of you will be familiar with this bike, but there's been a bit of a change around, and I'm the new custodian. Being a big fan of the current Oil cooled XR69s and team Force Harris F1 bikes, I'd long fancied building something myself. The final straw was following @Mole28down the pit lane at Donnington a couple of months back on his freshly built Magnum 2. A wanted add on here produced a couple of tempting offers of Harris Magnums, and a near miss on a facebook ad too. I even looked at the Saxon engineering replicas, but didn't like the quality of some of those bits. Then Gary @fatblokeonbanditdropped me a PM. A quick viewing, and a price was agreed, lot's off projects and surplus parts were sold off, and yesterday I took a trip to the cosmic centre of the universe to collect this. So for those that don't know, it's a genuine Circa 1985 Harris Performance F1 frame and rear suspension, the tank is also a Harris F1 endurance spec Item but made later. I'm told the bike originally was built for a GPz600 engine, is that right Garry? Later in the Mid Nineties it was rebuilt as a road legal Streetfighter, though we believe never used, with a Gsxr750wp engine, and won a few shows. Garry has configured it for an oil cooled engine, but stuggled to get clearance on the carbs for an 1100. I intend to build it into a race bike, with a nod to a day light mot, and using it for the seting new course records on the West Bay TT. Motor will be a 1052 board to 80mm with a worked head and cams, and rs40 flatslides. I have all the bits to build this motor, but need to mock it up and see what mods are needed to get it in the frame. Running gear will be astralites, and probably 43mm GSXR 750j/k forks, with Maxton internals. If anyone has a good set of these forks let me know. Body work will be a cut down XR69 tail, and either an RGB500 or Harris half fairing. The tank is beautifully made and very light, and never had fuel in it, but I'm not sure I like the shape, so may make a tank similar to the square low line tanks on the current iterations from Harris. First job is to get the thing fully stripped, and get the paint chemically removed from the frame, and see what modifications and repairs are needed. Edited July 9, 2018 by dupersunc 16 Quote
R1guy Posted July 9, 2018 Posted July 9, 2018 29 minutes ago, dupersunc said: So, most of you will be familiar with this bike, but there's been a bit of a change around, and I'm the new custodian. Being a big fan of the current Oil cooled XR69s and team Force Harris F1 bikes, I'd long fancied building something myself. The final straw was following @Mole28down the pit lane at Donnington a couple of months back on his freshly built Magnum 2. A wanted add on here produced a couple of tempting offers of Harris Magnums, and a near miss on a facebook ad too. I even looked at the Saxon engineering replicas, but didn't like the quality of some of those bits. Then Gary @fatblokeonbanditdropped me a PM. A quick viewing, and a price was agreed, lot's off projects and surplus parts were sold off, and yesterday I took a trip to the cosmic centre of the universe to collect this. Photos or it never happened?!?! Quote
dupersunc Posted July 9, 2018 Author Posted July 9, 2018 After I done the deal, I made a nice little score on eblag. Quote
dupersunc Posted July 9, 2018 Author Posted July 9, 2018 7 minutes ago, R1guy said: Photos or it never happened?!?! I don't know what you mean... Quote
fatblokeonbandit Posted July 9, 2018 Posted July 9, 2018 flippin' 'eck Dunc, slow down, your making it look all to easy the clearance on the carbs looks like loads!! And who has tidied up your garage!!!!!!! 1 Quote
stockcar Posted July 9, 2018 Posted July 9, 2018 make sure you dont try and use TWO rizzla papers................ Quote
Duckndive Posted July 9, 2018 Posted July 9, 2018 Luv that shock linkage mega chip shop points 1 Quote
KATANAMANGLER Posted July 9, 2018 Posted July 9, 2018 That is a thing of rare beauty. Did you tidy up for your new toy or is your workshop always that tidy? Quote
dupersunc Posted July 9, 2018 Author Posted July 9, 2018 This my little workshop space I rent. I like to keep it tidyish as I do customer work here. My garage at home is a over run tip at the moment. Quote
fatblokeonbandit Posted July 9, 2018 Posted July 9, 2018 14 minutes ago, dupersunc said: This my little workshop space I rent. I like to keep it tidyish as I do customer work here. My garage at home is a over run tip at the moment. That explains it Quote
KATANAMANGLER Posted July 9, 2018 Posted July 9, 2018 46 minutes ago, dupersunc said: This my little workshop space I rent. I like to keep it tidyish as I do customer work here. My garage at home is a over run tip at the moment. That makes me feel better. Quote
Mole28 Posted July 9, 2018 Posted July 9, 2018 The forks on the Donnington Harris are from a ZRX 1100. They are 43mm and the longest readily available RWU forks. Quote
Dezza Posted July 9, 2018 Posted July 9, 2018 Weren't most of those frames made for GPZ750 motors (F1 went to 750 in 1983)? I think the rear mounts for the GPZ 750 and GSXRs are the same. It is certainly feasible though that it was made around a GPZ600 motor, as then it would be eligible for F2 at the time (600 four stroke and 350 two stroke limit). Will be following this closely as it looks like a great project Quote
dupersunc Posted July 9, 2018 Author Posted July 9, 2018 (edited) I think you could be correct on the Gpz 750. The log book states it had gpz600 motor in 97 when it was road registered. The rear mounts aren't the same as the gsxr frames though. This is a friends F1, this has a good provenance, note the magnesium flat slides and big fin barrels, the head casting is different to. Top rear engine mount is quite different. Edited July 9, 2018 by dupersunc 5 Quote
clivegto Posted July 10, 2018 Posted July 10, 2018 (edited) Nice project Dunc, looking forward to seeing its progress. Did you fit the side throttle cable control ? Edited July 10, 2018 by clivegto Quote
dupersunc Posted July 10, 2018 Author Posted July 10, 2018 1 hour ago, clivegto said: Nice project Dunc, looking forward to seeing its progress. Did you fit the side throttle cable control ? Not me. I'll move it to the centre in the final build. 1 Quote
Dezza Posted July 10, 2018 Posted July 10, 2018 Why does your mate use the larger oil cooler on his bike as the head cooler, and the smaller cooler as the 'main' cooler? Or is there something there that we cannot see? I ask as I am going to use a small cooler in the seat as a head cooler (to appease my vanity as much as for any utilitarian purpose) on my bike. Quote
cregnybaa Posted July 10, 2018 Posted July 10, 2018 On 7/9/2018 at 2:25 PM, dupersunc said: It fits! The gearbox output shaft and swingarm pin does not appear to be on a level plane ?. will this not cause problems. Quote
dupersunc Posted July 10, 2018 Author Posted July 10, 2018 18 minutes ago, cregnybaa said: The gearbox output shaft and swingarm pin does not appear to be on a level plane ?. will this not cause problems. Swing arm pivot position is a huge can of worms The angle of the pic makes it look a little strange. I'm pretty happy that it's in a good working position Once the frame is back from the blasters I'll build up the rolling chassis and empty cases with a base line ride height and head rake and take some measurement, and then analyse the geometry to se if I need to move the swing arm pivot. I don't want to move the, swing arm pivot, but it's something I'm comfortable doing if I need to. 4 Quote
Simbec1863 Posted July 10, 2018 Posted July 10, 2018 Good project will be following part2 with interest Quote
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