GuyWithAviators Posted December 5, 2017 Author Share Posted December 5, 2017 I did some stuff to the things and now it does this. Update later when I try not to be dead. 9 Quote Link to comment Share on other sites More sharing options...
Threeonthetree Posted December 5, 2017 Share Posted December 5, 2017 Crikey! How easily did the big block slip in there? 1 Quote Link to comment Share on other sites More sharing options...
chees- Posted December 5, 2017 Share Posted December 5, 2017 Can you bone front to match rear? 1 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted December 5, 2017 Author Share Posted December 5, 2017 6 hours ago, Threeonthetree said: Crikey! How easily did the big block slip in there? Bloody piece of piss. Just had to take out the rubber spacer blocks from the mount holes. The foot rests don’t fit though as the clutch hump is at the back of the engine rather than the front. Need to cut and weld them at a different angle under the exhaust. 1 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted December 5, 2017 Author Share Posted December 5, 2017 4 hours ago, chees- said: Can you bone front to match rear? Yep! That’s on my list of things to do. The rears were an experiment as they don’t affect the handling too much. 1 Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted December 6, 2017 Share Posted December 6, 2017 pw80 engine? 1 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted November 13, 2018 Author Share Posted November 13, 2018 Ah so yep this now has a PW80 donk in it - yeah the kids dirt bike. Bolted right into the frame with only a small mod to the oil pump cable needed and the right foot peg having to be cut and rewelded at a different angle. I swapped the points igition /stator over to the PW80 block to make it easier to keep the lights etc. Then got bored of the average paint job I'd done so stripped it back down again. This is the result. A friend of mine who may or may not work at Air NZ helped me paint it. So if it looks like Boeing black that may be true... I also bought a NOS front guard and rack for it and some repro rear side covers and a leg shied, changed the rear trail light and lowered the front a little. Love the look of it now. 8 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted November 13, 2018 Author Share Posted November 13, 2018 Then the top end sounded a bit rattly so decided to put a new top end on - eBay special. Nice castings. Old top end: New top end: Went together fine but 5km up the road it locked the back wheel up on me. Hmm weird. Just a lean seize - see the marks on the corners of the piston / cylinder. This is running a pod filter straight onto the carb - no airbox etc. So I got some larger jets from NZ @Raizer Scootercare and got 7km up the road this time. So I tried fitting the stock V50 airbox and sucess - it was very rich and 4 stroking. This means I have room to safely jet it down. But even with the smallest stock size jet it did the same. Realised the factory V50 intake tube was way too small to replaced this with a straight bit of tube matching the carb throat size. That - with the stock size jet and some foam in the airbox is perfect. 5 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted November 13, 2018 Author Share Posted November 13, 2018 Then the next week I loaded it up on my Landcruiser rack and trucked down to Christchurch to ride a few hundred k's with QCR / Easties / Moped NZ. Stopped off for a pest in Wellington on the way too. Bike ran flawlessly over the weekend and I've done heaps of rides on it since. This engine swap hasn't increased the top speed much but it gets there a lot quicker - I love it. Future plans include this rare V90 engine I picked up and this Malyasian Yamaha Mate100 aftermarket expansion chamber I brought over. 7 Quote Link to comment Share on other sites More sharing options...
Popular Post GuyWithAviators Posted November 13, 2018 Author Popular Post Share Posted November 13, 2018 More Yamaha sharns. Quake City Rumblers Dirtmasters 2018 was coming up and FOAMERS got invited. I put the word out for a bike and this thing was offered to me. So picked that up and spent the few days before with @mo999 sorting it out for some dirt racing. We threw in a V50 engine I had stashed in Christchurch. A homemade expansion chamber ex PPSC. 18" front wheel with no brake hub lol. CT90 rear shocks and seat. Flipped CT90 bars and controls. Was def not the fasted bike there by any means and I actually ended up bending the frame over some jumps enough that it wouldnt corner anymore. Still magaed to pop the knobbly tyre though at the end. Also won Cool Cunt award from QCR for my committment to this POS bike. 9 1 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted April 7, 2020 Author Share Posted April 7, 2020 Update on my V50. Looks much the same as in 2018 but I raised the rear suspension a little, my cutties were too low. Matches the front now, had reverse rake before. Comfy too. Also added 72 spoke rim set and white wall tyres (2.25f / 2.5r) - well just the rear at the moment. They're made for a Honda C50 so the front hub is a bit different in regard to the brake stopper location. I almost got it working with a V90 front fork and Honda C200 hub which has an arm to hold the hub for the brakes rather than a small nub sticking out of the suspension arm - but it moved wrong with the leading link stz and would bind up everything. @mo999 is working on a fix though, has drawn some arms up to suit Honda wheel into Yamaha fork with inspiration from 'Draft Customs in Thailand lowering front suspension links' And a handy wee middle basket from Malaysia - it's for a Honda Wave 125 but some trimming with the dremel and bending of the supplied brackets it fits. Can fit lots of lasagne toppers and Lion Browns in it. 7 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted April 7, 2020 Author Share Posted April 7, 2020 Oh, also wanged the V90 motor and Mayalsian spanny in it. Looks and sounds pretty saucy. GPS says it does 92kph lols. I put a smaller rear sproket on too, 32t compared to stock 39 (I think). Lost a little acceleration of course but not hard to change back when I want wheelies. Jets for this carb are expensive and limited size so I've been playing with Aliexpress micro drills to get more fuel into it. Little worried about seizing it as V90 parts are really hard to come by. I need to go richer still, until it starts 4 stroking / plug is rich then go down a couple sizes on another jet. Running a metal meshy pod filter. The can on the end does nothing, it's quite loud. I packed it with muffler packing and it made it a bit deeper. It'll do. 8 Quote Link to comment Share on other sites More sharing options...
Popular Post GuyWithAviators Posted April 7, 2020 Author Popular Post Share Posted April 7, 2020 Here's a couple of side on photos of how it looks. I took these photos for @MopedNZ's article on Yamaha V series that he put on his website:https://www.smallbikestuff.com/yamaha-v-series Also discovered the massive indonesion scene for modifying and racing their V series bikes. Styles are questionable but I love the passion for these bikes regardless. https://www.instagram.com/explore/tags/vseriesracing/ 12 1 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted September 1, 2021 Author Share Posted September 1, 2021 One day I’ll update this thread in more detail but basically I also have this Yamaha, a 63 YG5. It was a bit slow so I swapped the motor out for one I picked up in S.E.A. It’s similar to a TTR110 kids dirt bike but no electric start. See the story here if you’re interested in the weirder side of small bikes. 2 Quote Link to comment Share on other sites More sharing options...
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