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Post by urbantangleweed on Apr 12, 2022 20:13:52 GMT 1
Todays task was to sort out the rear subframe rails stolen from the RD frame and re-purpose them as top engine cradle mounts, it all went fairly well really.
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Post by urbantangleweed on Apr 12, 2022 20:18:40 GMT 1
First one cut to size and fish-mouthed for welding Both now in place and roughly positioned to allow clearance between them for the central top hose from the thermostat housing and for the spark plugs to be easily fitted/removed once it's all buttoned up, we'll allow a little extra for plug caps to fit on too. It all needs to be tacked in place now then we can whip the engine out and remove the cradle for all joints to be fully welded. The top of the cradle tubes will at that point be removed just above the top rad mount brackets as that structure will not be needed.
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Post by urbantangleweed on Apr 13, 2022 15:53:52 GMT 1
Today the engine cradle mods got welded up. Back in the bike and everything still fits as well as it did before, so that was nice! Need to work something up to sort out the lateral bracing next, looking like building off the front tubes just above the rad mounts, but that's for another day.
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Post by abar121 on Apr 13, 2022 17:40:44 GMT 1
Looking good, loving it so far.
Is there anyway to triangulate the top of the cradle with the main frame spar, perhaps welding on a bracket a couple of inches along from the bottom yoke?
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Post by urbantangleweed on Apr 14, 2022 9:57:36 GMT 1
Looking good, loving it so far. Is there anyway to triangulate the top of the cradle with the main frame spar, perhaps welding on a bracket a couple of inches along from the bottom yoke? That's the next puzzle to resolve, but we have a plan!
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Post by urbantangleweed on Apr 16, 2022 6:09:42 GMT 1
Turns out truck brake pad backing plates provide excellent engine mount brackets!
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Post by urbantangleweed on Apr 16, 2022 6:11:33 GMT 1
Engine cradle top mounts fabricated and tacked in place ready for proper welding.
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Post by stirling11 on Apr 16, 2022 17:10:49 GMT 1
Now you have the top and bottom mounts of the engine cradle sorted, are you able to do away with the two top tubes that run over the top of the engine
You'd have the cradle attached to the frame at 4 points and with the ties bars in place and the engine bolted to the cradle, would you get much twist if those two top tubes were removed ?
I'm thinking of how the engine in my Bandit is mounted as it's quite similar to the YPVS the way you have it
If you needed more rigidity you could triangulate across from one side of the original frame to the other on both sides similar to a Ducati tube chassis
Either that or I'am missing something very vital
Yes, like others eager to see what becomes of this, particularly as YPVS and /or LC frames become harder to source
Loving it so far keep on keeping on
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Post by urbantangleweed on Apr 17, 2022 7:12:46 GMT 1
Now you have the top and bottom mounts of the engine cradle sorted, are you able to do away with the two top tubes that run over the top of the engine You'd have the cradle attached to the frame at 4 points and with the ties bars in place and the engine bolted to the cradle, would you get much twist if those two top tubes were removed ? I'm thinking of how the engine in my Bandit is mounted as it's quite similar to the YPVS the way you have it If you needed more rigidity you could triangulate across from one side of the original frame to the other on both sides similar to a Ducati tube chassis Either that or I'am missing something very vital Yes, like others eager to see what becomes of this, particularly as YPVS and /or LC frames become harder to source Loving it so far keep on keeping on The tubes that run over the top of the engine provide much of the strength in the front of the cradle but we feel don't have as much effect in combatting twist or drop as we'd like. The two front mountings add some extra rigidity to help against this, but in essence, they provide what we feel is a nice neat solution to tidy up the front of the cradle and help it look complete. So to answer your question, the six mounting points will remain and the tie bars will add even more strength into it.
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Post by urbantangleweed on Apr 17, 2022 7:27:22 GMT 1
A trip up to Dave Whattam yesterday saw us on the way home with a complete YPVS engine in the boot. As mentioned early on in this thread, we had intended to us what we needed from the F1 purchase and sell on what was left, but that plan changed when we got it home, saw how original it was, and decided it would be sacrilege to do that, so another engine was needed and Dave came up trumps for us. Once it's finished, we hope to take it up to Dave to put on his Dyno and decide what we do regarding final pipes, in the meantime, it will run those borrowed from the F1. As it was on the way home, and only 10 miles from Dave's, we also took the opportunity for lunch at Squires 😊
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Post by urbantangleweed on Apr 17, 2022 18:45:39 GMT 1
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Post by urbantangleweed on Apr 18, 2022 21:15:06 GMT 1
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Post by urbantangleweed on May 14, 2022 20:29:28 GMT 1
OK, sorry that this one's been a bit quiet but the last few weeks have largely been doing background stuff, rebuilding the engine, sourcing parts etc., but today a lot of that came together and she's finally got her real engine in. Stuff to do tomorrow regarding fabricating brackets and plates to mount the coil, cdi, ypvs controller, servo etc, but it's starting to come together quite nicely. Managed also to fit a modified ypvs airbox which means she'll be able to breathe properly. Here's a photo of where she's currently at, will try and do another update tomorrow night.
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Post by urbantangleweed on May 18, 2022 5:47:38 GMT 1
The MT, being fuel injected, was fed fuel by a pump, annoyingly, this is pumped out of the top of the tank, not much good when you need a gravity feed..... So a plan was hatched, fuel tap bought and it fitted into the bottom of the tank very nicely indeed. The tank is about 4mm thick plastic, nice and sturdy, so all that was needed was to put the holes in the right place, make up a corresponding plate for the inside (used 5mm ally) and sandwich it all together. The rubber gasket on the tap might well have provided a seal, but didn't trust it so two extra gaskets were cut from a sheet of fuel resistant rubber, one on the outside and one on the inside for good measure. After a bit of gynaecology practice to fit it all through the hole where the pump and sender unit fit, all seems good, she's sat all night with a couple of litres of fuel in and this morning no leaks. Also needed to get the coil and servo mounted and it all fitted in quite nicely. The servo can't be exactly where it is in a YPVS frame, but it's somewhere near and although the cable runs aren't completely ideal, it should do what it needs to do.
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Post by urbantangleweed on May 18, 2022 6:07:52 GMT 1
The next thing to sort out will be the electrics. I found two looms in my electrical spares box, a 1UA and a 3HM. The 3HM is in fantastic condition but as we'll have to make some quite radical amendments, it seems wrong to use the 3HM item so the 1UA will be prepped for surgery. It comes with a few previous owner repairs and "improvements" anyway, so it's the right candidate for the job. It's very early days on the electrical front but we do want to keep the original MT switchgear if possible and at this point it does seem so, just need to get the corresponding multi plugs from Kojaycat to avoid having to make all new connections on both sides. Original CDI's and PV controllers go for strong money these days and as they're old and potentially unreliable, a Zeel PCDI-10VT will bring all that into one box. It can also be plugged into a laptop for adjustments to timing and powervalve movement so it's a more fitting thing to have on a 5 year old bike than two analogue units from the 1980's. I'm working away for three weeks from next Monday so not much will happen now until mid-June, but stuff's ordered and I should have a nice big box of bits waiting for when I get back.
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Post by urbantangleweed on May 19, 2022 22:35:49 GMT 1
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Post by urbantangleweed on May 20, 2022 7:51:38 GMT 1
P.S.
One of the things that the anorak in me found really interesting is that there's 30 years of evolution between the MT and YPVS, yet the multi block connector wiring between the F2 loom and MT handlebar switch connections are the same colour for each function. That makes life easy! Of course the blocks are of a different design, but snip off the MT blocks, crimp 2.8mm female mini spades on the wires, push them into the corresponding mating block and hey presto, all should be well. I can't think it's actually going to be that easy......
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Post by buck1963 on May 20, 2022 19:56:14 GMT 1
Looking really good!I've sent dave a link to a cheap Mt up near me in the North East,comes minus the motor if you fancy doing another!
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Post by urbantangleweed on May 21, 2022 5:58:06 GMT 1
Looking really good!I've sent dave a link to a cheap Mt up near me in the North East,comes minus the motor if you fancy doing another! Thank you! Can you PM me the link? If it's cheap enough, we could of course put our removed MT125 engine in and sell it on........
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Post by urbantangleweed on Jun 23, 2022 11:30:48 GMT 1
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Post by JonW on Jun 23, 2022 14:25:13 GMT 1
Loving the electrics side of this project so much, would love to have a go with one of those style fuseboxes. Let us know how you find it.
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Post by urbantangleweed on Jun 23, 2022 15:19:31 GMT 1
Loving the electrics side of this project so much, would love to have a go with one of those style fuseboxes. Let us know how you find it. I just want to try some things a different way on this one, currently trying to convince Dave that we should use the option on the Zeel of fitting a quickshifter 😎
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Post by JonW on Jun 24, 2022 0:08:58 GMT 1
The Zeel has had that option for many years and I cant remember anyone using it? Maybe one person at the back of my mind? I always thought it was a good thing to play with but never had the parts so keen to see what you come up with
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Post by urbantangleweed on Jun 24, 2022 7:23:12 GMT 1
Fuel gauge now working, only the speedo sensor to mount and then set the unit up to display what we want it to. It also has a gear position indicator which "learns" the gears, interested to see how that works but to do that it needs to be rideable. So far, the KOSO DB03-R is a very impressive unit.
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Post by urbantangleweed on Jun 24, 2022 7:41:02 GMT 1
I've also found through this build how little Yamaha have changed many of the fundamental things over the 40 years between the YPVS and MT we're splicing together. The wiring colours in the F2 loom pretty much correspond to the same components on the MT and the F2 ignition switch bolted straight in place on the MT top yoke with no modification whatsoever, the steering lock also engages correctly and you can also choose to lock the steering to either the left or right.
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Post by urbantangleweed on Jun 25, 2022 18:29:00 GMT 1
Darren (kirkhd) off here was good enough to lend us some Derek Huxley pipes he has to try on, unfortunately they just didn't fit suitably due largely to the steep steering geometry of the MT, but we do like the GP Style with both cans on one side so it was a useful exercise just for the aesthetics. These pipes are beautifully made and would look fabulous on a standard or modified bike, the carbon fibre cans are a work of pure art in themselves, also, the pipes and cans have never been run on a bike so are in almost pristine condition and are virtually just as they were the day they were bought. Darren would sell them for the right money, so if you like the look of them, drop him a message and maybe you could have a deal.
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Post by urbantangleweed on Jun 26, 2022 18:37:46 GMT 1
Got bored with tidying up the wiring so I changed tack and played about with the dash mount plate for the KOSO.
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Post by urbantangleweed on Jul 1, 2022 19:20:52 GMT 1
MT350 wiring 101, lunchtime to teatime, made progress, more to do but its getting there, oh, and everything still appears to work which is a bonus! 😊
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Post by urbantangleweed on Jul 3, 2022 21:30:19 GMT 1
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Post by urbantangleweed on Jul 3, 2022 21:34:45 GMT 1
I couldn't resist dressing her when I got home, OK, it will all have to come off again, but I just wanted to see how she looked with some of her clothes on. I like it. A lot! 😎
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