nlovien Posted July 11, 2018 Posted July 11, 2018 be great having a decent rider document the chassis set up / build - be interesting to see if you prefer it - old school, stable but a bit slow on the turn on big wheels, or more modern - weight pushed fwd - quick steering response, smaller wheels etc.. 1 Quote
dupersunc Posted July 11, 2018 Author Posted July 11, 2018 I would call my riding decent. The bike was designed around crossply tyres and I guess and 18" rear, 16" front. It will be set-up around modern supersport radials so the optimum rake, trail, swing arm pivot, weight distribution etc. will all be different. Once I have a set off forks to hand I can see where we are. Just found out how much it's gonna cost to have a decent set of forks built. Gulp. Needs to be right though 1 Quote
nlovien Posted July 12, 2018 Posted July 12, 2018 i'm a yr or so away from getting my modified magnum 3 on the road ( the mag 3 is close to the F1 chassis) your welcome to try the front end on it - as an option to help direction - should be a bolt on job - coupled with a bit more rear ride height + shifting the engine fwd ( your is about as far fwd as you can get ) it changed how the bike worked a lot! for the better Its the 45mm fireblade fork front end tweaked by Maxton c/w the wide profile 16" front - don't recall offset / trail but it manages the magic sweet spot of feeling like it will turn on a sixpence yet behaving very planted and stable ( not needing a steering damper ) - on the rare occasion it would shake but self correct before you think of it - this needed something like a rippled up inside corner to set it off - its a bit shorter than what was on the bike - again this adding to the front end biased feel anyway - if its any use to you as a test - no worries - all you'd need is a fresh tyre on it Quote
dupersunc Posted July 12, 2018 Author Posted July 12, 2018 Thanks @nlovienfor the kind offer, but I think I'm sorted for a front end. Quote
nlovien Posted July 12, 2018 Posted July 12, 2018 good stuff, going to really appreciate your feed back on how you set it up 1 Quote
dupersunc Posted July 14, 2018 Author Posted July 14, 2018 (edited) Blasted. Given a quick once over. Bit of work to do, Remove some ugly added on brackets, and repair the subframe and lower rear engine mount which has been poorly modified when the water cooled motor was fitted. I want to add a few brakets for an oil cooler, and lower middle engine mounts too. On the whole though, it's in really good nick. Edited July 14, 2018 by dupersunc 10 Quote
Dezza Posted July 14, 2018 Posted July 14, 2018 Nice one. If you give Harris the frame number, can they tell you what engine it was originally built to house? There is an old article in Motorcycle Mechanics Fortnightly on one of Jim Wells's 750 Kawasaki's with many great pics of the bike with the bodywork off, which would probably be of interest to you as the frame is almost identical to yours. I cannot remember which issue though, and I flogged all my old bike mags (8 boxes of them) about 6 years ago. Wells's bike did indeed have 16/18 inch wheels, and was about as minimalist as possible. 1 Quote
Dezza Posted July 14, 2018 Posted July 14, 2018 Yep, that is the article I was droning on about Quote
fatblokeonbandit Posted July 15, 2018 Posted July 15, 2018 The 1052 gear is 28 teeth, ive got one here Dunc I did ask Harris about the frame number, the reply was its a F1 race bike from the early 80's, but they didn't keep records of who bought them, he thinks it was for a kawaskii probably a 600 or 750 but wouldn't confirm or deny either anyway its looking ace Dunc, this is what i hoped to do when i bought it, glad you are doing it Quote
dupersunc Posted July 15, 2018 Author Posted July 15, 2018 I'll post the 26t gear to you this week Garry. Looking at the engine mounts I'm fairly sure it was built for a gpz600 originally. 750 mounts seem quite different Quote
fatblokeonbandit Posted July 15, 2018 Posted July 15, 2018 1 hour ago, dupersunc said: I'll post the 26t gear to you this week Garry. Looking at the engine mounts I'm fairly sure it was built for a gpz600 originally. 750 mounts seem quite different ill post the 28 tootth gear tomorrow Quote
clivegto Posted July 18, 2018 Posted July 18, 2018 @dupersuncare you leaving the frame like that what's the tin of wurth stuff ? I presume you have coated it with ? From what I have been told the old race frames where left bear to check for cracks. Quote
dupersunc Posted July 18, 2018 Author Posted July 18, 2018 1 hour ago, clivegto said: @dupersuncare you leaving the frame like that what's the tin of wurth stuff ? I presume you have coated it with ? From what I have been told the old race frames where left bear to check for cracks. I think I'm going to leave bare for the time being, just keep it coated with wd40 or the worth equivalent, a quick wipe down after each day s running should be enough. As you say leaving them bare makes it easier to check for and repair cracks, already spotted a couple of bits of braze that need repairing. I really hate it when people clear coat frames like this, make repairs and inspection needlessly tricky. It I do give up on keep rust at bay it will be painted in a pale grey that will show up any cracks that do appear more easily. 1 Quote
Gammaboy Posted July 19, 2018 Posted July 19, 2018 (edited) A mate of mine uses CRC Soft seal on all the steel stuff he works on so that it doesn't flash rust in QLD humidity - I dunno how usefull it would be on a bike frame though. https://www.crcindustries.com.au/products/corrosion-protection-and-inhibitors/soft-seal-corrosion-inhibitor Edited July 19, 2018 by Gammaboy Quote
KATANAMANGLER Posted July 19, 2018 Posted July 19, 2018 ACF50 is is an excellent rust inhibitor. I use it on my winter bike. Give it a good covering, leave it for 30 minutes and then wipe off any excess. 1 Quote
nlovien Posted July 19, 2018 Posted July 19, 2018 linseed oil etc.. works fine, the inhibitors are good - ref: acf50 - some of them tend to stain the metal with a phosphate coating - can look a bit yeucky hence using just an oil - the chromoly will pit rust just from the smell of a wet fart Quote
dupersunc Posted August 14, 2018 Author Posted August 14, 2018 (edited) So, been a bit slack with this, but sourced lots of odds and ends, mostly stuff like bearing bolts, and fastners, oil line fittings, oil cooolers, shit that all adds in £££. Spent some time machining up new spacers and bits for the engine mounts, and lots of bosses for mounts on the frame. Also scored some XR69 bodywork. Today I saw an old boy wandering past the workshop, who looked like he's 112 so probably old enough to know how to Bronze weld. Footwear is standard workshop attire round these parts. New lower engine mount bushes going in. Fortunately Nick's dementia shakes mean his hands wobble at the perfect frequency to lay down lovely bronze fillets. Subframe put back to originalish spec. New Oil cooler mounting bosses. Exhaust hanger mounts Edited August 14, 2018 by dupersunc 13 Quote
dupersunc Posted August 14, 2018 Author Posted August 14, 2018 I'm trying to get this ready for a trip to Portimao in early October, but it may have to wait until Jerez in early December for it's debut. To get it built in time I'm going to fit the Mistral built ex sidecar 1216cc motor I have on the shelf for this year, and build the 1052 based motor for next year. I have just about everything on the shelf to build this up now, though some parts are still in sheet and tube form. The one stumbling block is the forks. I have a set of gsxr 750 j forks and yokes. The yokes are ok for now, I'll press in the Harris stem, and shave the castings down. once I'm happy I know what offset I want, I can decide if I want a pukka set of Harris yokes. The fork legs them selves though need £1000-1200 throwing at them to get them to the spec that's worth having. I can't afford that currently. I'm hoping for a tour round Classic team Suzuki workshops wearing a coat with very long pockets. 1 Quote
Mar71n Posted August 15, 2018 Posted August 15, 2018 15 hours ago, dupersunc said: I'm trying to get this ready for a trip to Portimao in early October, but it may have to wait until Jerez in early December for it's debut. To get it built in time I'm going to fit the Mistral built ex sidecar 1216cc motor I have on the shelf for this year, and build the 1052 based motor for next year. I have just about everything on the shelf to build this up now, though some parts are still in sheet and tube form. The one stumbling block is the forks. I have a set of gsxr 750 j forks and yokes. The yokes are ok for now, I'll press in the Harris stem, and shave the castings down. once I'm happy I know what offset I want, I can decide if I want a pukka set of Harris yokes. The fork legs them selves though need £1000-1200 throwing at them to get them to the spec that's worth having. I can't afford that currently. I'm hoping for a tour round Classic team Suzuki workshops wearing a coat with very long pockets. LOl, & I actually did lough out loud. Quote
R1guy Posted August 18, 2018 Posted August 18, 2018 On 8/14/2018 at 9:05 PM, dupersunc said: The fork legs them selves though need £1000-1200 throwing at them to get them to the spec that's worth having..... What spec are you going for? Quote
Gixer1460 Posted August 18, 2018 Posted August 18, 2018 Thought I recognised that frame colour in the 1st post........... 1 Quote
dupersunc Posted August 19, 2018 Author Posted August 19, 2018 23 hours ago, R1guy said: What spec are you going for? I've been spoke to Maxton about their sp20 cartridge kit which is @£500 plus fitting which takes a bit of machining @£140, springs £80 then new stantions @£180, bushes, oil, seals etc. all plus vat. I've just sourced a brand new pair of rf900 fork legs at a good price, the seller recommended Ktech cartridge kit over the Maxton, which is similar money. Quote
dupersunc Posted August 23, 2018 Author Posted August 23, 2018 Slowly, slowly the dry build begins. It's slow process as just about ever bracket, spacer and mount needs designing and making from scratch. Oil cooler brackets roughed out. 7 Quote
dupersunc Posted August 25, 2018 Author Posted August 25, 2018 Starting to look like a bike again. 7 Quote
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