Dezza Posted September 5 Posted September 5 Any idea what engine the frame was originally built for? I would have guessed a bloody great air cooled four so it's a little puzzling why putting a teensy-weensy little oil cooled engine in it results in such a lack of space at the sides . Quote
clivegto Posted September 5 Author Posted September 5 3 hours ago, Dezza said: Any idea what engine the frame was originally built for? Yes @jbasked Georges Martin and he sent him a letter saying it origanly had a GS1000 motor and I have the letter 3 Quote
Dezza Posted September 5 Posted September 5 Weird - a GS1000 engine is clearly much larger than a B12 engine so we'd expect more clearance all round not less when a physically smaller lump is fitted Maybe the orignal engine sat lower in the frame. Quote
TonyGee Posted September 5 Posted September 5 54 minutes ago, Dezza said: Weird - a GS1000 engine is clearly much larger than a B12 engine so we'd expect more clearance all round not less when a physically smaller lump is fitted Maybe the orignal engine sat lower in the frame. Ive just done some quick measurements of my GSX11 and B12 engines and theirs not a lot of difference really !!!! the only big difference is the GSX is about 3.5 inches wider along the crank plane because of the geny. Quote
clivegto Posted September 5 Author Posted September 5 2 hours ago, TonyGee said: Ive just done some quick measurements of my GSX11 and B12 engines and theirs not a lot of difference really !!!! the only big difference is the GSX is about 3.5 inches wider along the crank plane because of the geny. And that hangs below the frame rails. 1 Quote
imago Posted September 5 Posted September 5 4 hours ago, Dezza said: Weird - a GS1000 engine is clearly much larger than a B12 engine so we'd expect more clearance all round not less when a physically smaller lump is fitted Maybe the orignal engine sat lower in the frame. I had very similar carb fitting issues with the 16v 1100 in the Dresda which previously had a GS 1000 engine. A bit of head scratching and asking around came up with the answer as to why very similar engines had very different fitment issues. Smooth bore/round slide carbs fitted to the GS engines (tuned or not) are way narrower at the top where the flat slides or CV carbs are wide. It was as simple as that. I got a set of smooth bores and they fit with plenty of room. 3 Quote
clivegto Posted September 9 Author Posted September 9 Bought a couple more of these flip plates, obviously for show use only. 6 Quote
clivegto Posted September 10 Author Posted September 10 Few little turbo bits turned up to plumb the carbs. Made a temporary bearing sleeve up out of mild steel for the swingarm arm pivot which is 17mm, new arm is 16mm and the bearings are different sizes to the bearings sleeves won't swap over. Nipped all the engine mounts up as well. 2 Quote
clivegto Posted September 12 Author Posted September 12 (edited) I did make another swinging arm bearing sleeve out of mild steel for mockup last night and fitted the swinging arm to see what was what. Today some needle roller inner rings made of carbon chromium steel arrived from Simply Bearings. I couldn't get the size I wanted so after some head scratching I ordered 2 different sizes 4 in total so one set slides inside the other which overcomes the difference between the swingarm arm and frame spindle size. Fitted it all together and made some temporary wheel spacers to get the back wheel to fit the 20mm spindle and centered it up. Not a lot of room for the sprocket carrier . Edited September 12 by clivegto 1 Quote
clivegto Posted September 16 Author Posted September 16 Removed the suds from the R1 sprocket carrier useing 2 nuts locked together and heated the carrier up with a heat gun to soften the thread lock. Got 5 of the 6 out alright but had to use a snap-on stuud extractor tool to get the 6th out . Done a few calculations and have take 21mm of the sprocket surface, that's as far as I've got this evening. 3 Quote
clivegto Posted September 17 Author Posted September 17 Took a load of material out of the hub to sink the carrier bearing further in and chopped the outside housing down. Trial fit shows the chain run to be out by 1mm because I left 1mm of material on the sprocket carrier incase my calculations were a little out. 530 chain just to say touches the frame and has 1.5mm clearance to the 190 tyre with the wheel in the middle, so will run a 525 chain which was my origanl plan anyway. Left enough material to fit a dust seal on the carrier but will remove that as it touches the swingarm arm, just run a sealed bearing like it already has. Am pleased with this evenings results as I knew it would be a tight fit. 8 Quote
clivegto Posted September 17 Author Posted September 17 1 hour ago, Svsam said: Looks snug Clive. Snug is good Tis snuger than a snug thing indeed mate. 525 chain will work well with this after a little fine tuning 1 Quote
clivegto Posted September 18 Author Posted September 18 Took some more material off the sprocket carrier then cut down the bearing carrier to 35mm, this is as hard as hell so I cut it down in the lathe with a slitting disc in the grinder then ground it to size with a flap wheel in the grinder. Worked a treat 7 Quote
clivegto Posted September 23 Author Posted September 23 Made a sprocket side captive wheel spacer up. 6 Quote
clivegto Posted September 24 Author Posted September 24 Made a captive spacer for the disc side and a spacer to take the slack up where the sprocket carrier will be. Remaid the spacer on the other side as I wasn't happy with it been just to say a bit slack on the spindle. Am happy with it now though 5 Quote
clivegto Posted September 24 Author Posted September 24 45 minutes ago, imago said: Moving along nicely. Cheers bud, I've ordered 525 16/43 sprockets and a DID 525zvmx chain so hopefully there should be 1.5mm clearance both sides of the chain to frame and tyre. 1 Quote
clivegto Posted September 25 Author Posted September 25 Got my hands on a Thunderrace bottom yoke then took it to my pal Will at Weab Motors in Malton to fill the underside with weld to strengthen it up. I then milled the top flat with the drill mill finishing with the belt sander. Made a spacer for the yoke stem and drilled a couple of holes to fit some risers I had in my stash of stuff. Bought some fatbars for this. This mod gives me a slightly stepped top yoke gaining 7mm drop 9 Quote
clivegto Posted September 27 Author Posted September 27 Bit of finishing for the top yoke risers fasteners. 2 Quote
clivegto Posted September 28 Author Posted September 28 Pushed it outside for a mock up with the oil cooler and headlights. 16 row oil cooler with twin 4 1/2" spot lights the same as Spondon used to use. Plan on running a little head cooler probably under the seat. 7 Quote
clivegto Posted September 29 Author Posted September 29 @Marc claytonthe new top yoke now allows me to drop the forks through the yokes 25mm more than standard. Nice to see you today. 1 Quote
Marc clayton Posted September 29 Posted September 29 3 hours ago, clivegto said: @Marc claytonthe new top yoke now allows me to drop the forks through the yokes 25mm more than standard. Nice to see you today. Good do I’ll have a read through your thread yea good to see you too matey next time your over to squires on your bike drop us a txt and I’ll try get over on mine Quote
clivegto Posted September 29 Author Posted September 29 (edited) 28 minutes ago, Marc clayton said: Good do I’ll have a read through your thread yea good to see you too matey next time your over to squires on your bike drop us a txt and I’ll try get over on mine Will do Edited September 29 by clivegto Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.