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redeem ouzzer |
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redeem ouzzer World Chat Champion
Joined: 06 Oct 2015 Karma :
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Posted: 19:45 - 04 Sep 2016 Post subject: YR5 Upgrade project |
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My old faithful Yamaha YR5 has been on the road for the past 8 seasons with very little in the way of issues except an oil pump failure (my fault for fitting the wrong replacement pump) and a dead alternator (rotor swapped for spare, HVC Cycle modern reg / rec fitted). I couple of years ago i ran into ground clearance issues on the road chasing my mate on his KR1S. I then started getting into doing classic trackdays on it which highlighted the issue further. I like riding it on track a lot, having proper handlebars and weighing next to nothing makes it great fun, however cultivating a riding style that has the ground clearance issues in mind is ultimatley limiting.
Exhibit A - Cadwell's mickey mouse chicane. https://youtu.be/DYg6Nwsjvqo?t=5m8s
Exhibit B - Cadwell - Park Corner.
https://youtu.be/DYg6Nwsjvqo?t=14m35s
Current setup is original footpegs and vintage Allspeed pipes which cost the grand sum of 20 ponds, RD barrels and carbs with cut down airbox and K & N drop in filter (no lid), 220 mains, 27.5 pilots, standard ignition with aftermarket coils.
https://i5.photobucket.com/albums/y164/BLUEX5/Mobile%20Uploads/2014-04/265E23DD-929A-4AB4-9179-C498A89F4DA8_zps6xhzik1h.jpg~original
https://i5.photobucket.com/albums/y164/BLUEX5/Cadwell%20Park%2011th%20and%2012th%20July%202015/DSC_9624_zpspgjncirx.jpg~original
First priority is to increase ground clearance, so a large credit card bill later and we have the following bits
HVC Cycle Rearset kit.
https://i5.photobucket.com/albums/y164/BLUEX5/F1C0410C-1BFC-4EA0-AE97-142277661F26_zpsorbugdap.jpg~original
Very, very expensive especially after import tax but top quality piece of kit.
Jim Lomas GP Style pipes.
https://i5.photobucket.com/albums/y164/BLUEX5/6C5BCB1A-A530-4341-9B0F-DA41CA5A26E6_zpsdoazxvx9.jpg~original
Again not cheap but quality. These chambers go under the sump and require removal of the centre stand and also possibly the stand lugs. Next job is to do a test fit of the pipes to see exactly what mods will be needed before the frame is sent for stripping and powder coating (it may also be that the side stand arrangement needs tweaking).
I'm also going for a power increase and less weight - plans are as follows.
- 28mm Carbs with K & N on standard Y-Boot (Standard carbs leak from float bowl joints due to distorted bodies, temporary fix with kawabond).
- O-Ring head conversion and custom squish band
- Ported barrels (not too extreme so no changing port heights, just widening and matching)
- Convert to premix (lighter and aftermarket carbs don't have injector points)
- Possibly source a 6 speed gearbox
- Fix the clocks (flappy needles due to tired mechanisms)
I'd like in the region of 50-60 bhp which combined with the minimal weight should make it able to outrun most 4T 400's in a straight line, coupled with the ground clearance improvements i should end up with a capable track tool which doesn't deviate too much from the general spirit of the original bike. ____________________ Be a REAL MAN! |
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Suntan Sid |
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Suntan Sid World Chat Champion
Joined: 07 May 2009 Karma :
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Posted: 20:12 - 04 Sep 2016 Post subject: |
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Well, I'm looking forward to seeing and hearing the finished bike!
Mind you, you probably need to give the bloke behind you, (in the photo), the contact details for the rearsets, he looks like he needs then more than you! ____________________ "Everybody needs money, that's why they call it money!" |
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Sean.S |
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Sean.S Trackday Trickster
Joined: 20 May 2015 Karma :
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Posted: 01:03 - 05 Sep 2016 Post subject: |
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Love the look of two stroke pipes like these, they should make the world of difference to the appearance of the bike |
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hmmmnz |
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hmmmnz Super Spammer
Joined: 22 Aug 2006 Karma :
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redeem ouzzer |
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redeem ouzzer World Chat Champion
Joined: 06 Oct 2015 Karma :
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P. |
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P. Red Rocket
Joined: 14 Feb 2008 Karma :
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Posted: 15:59 - 05 Sep 2016 Post subject: |
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That is very nice mate Look forward to seeing the finished result. |
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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stevo as b4 |
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stevo as b4 World Chat Champion
Joined: 17 Jul 2003 Karma :
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Posted: 20:20 - 19 Sep 2016 Post subject: |
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Exciting times ahead!
Jim's pipes look the business too, and I like seeing more people go for stainless steel, as there's still all sorts of ancient mythology on the net about the worth of stainless expansion chambers too.
I'm a wimp, and would have been spending out on a modern spec twin disc front brake for it, way before the ground clearance and power hunting. But I'm guessing its either a very effective drum brake set up, or it just needs big balls to ride on track? |
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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stevo as b4 |
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stevo as b4 World Chat Champion
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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redeem ouzzer World Chat Champion
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stevo as b4 |
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stevo as b4 World Chat Champion
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redeem ouzzer World Chat Champion
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Dimerz |
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Dimerz Nitrous Nuisance
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redeem ouzzer World Chat Champion
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redeem ouzzer World Chat Champion
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Posted: 18:56 - 14 Nov 2016 Post subject: |
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More goodies arrived from my friends across the pond.
VM28 racing carbs. I know I'd planned on using 2MA flatsides, but I needed a complete set and the prices eBay twats were asking for 25 year old carbs that might or might not be complete or terminally worn didn't inspire.
https://i5.photobucket.com/albums/y164/BLUEX5/D171976E-71D1-43EF-8A5C-E0AE05F71EA6_zpsxgqyflya.jpg
Powerdynamo ignition. I've used this before on my first aircooled 350 (I was the first in the U.K. to use it). Current incarnation is slightly improved, comes with switching relay and new rotor with keyway and sloped magnets (stops engine trying to run backwards).
https://i5.photobucket.com/albums/y164/BLUEX5/CC31C645-C3C9-40CC-B883-5DFD8B5AB19C_zpsmq6r9wmm.jpg
I'm going to use the Powerdynamo to trigger a Zeeltronic DC CDI which will give me programmable ignition, rev limiter, revcounter / shift light and live mapping which will let me run a more radical tune on the barrels while keeping it rideable. ____________________ Be a REAL MAN! |
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CaNsA |
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CaNsA Super Spammer
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RhynoCZ |
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RhynoCZ Super Spammer
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stevo as b4 |
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stevo as b4 World Chat Champion
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Posted: 01:44 - 15 Nov 2016 Post subject: |
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The race crank looks pretty damn cool, but it's outdone by the sheer bling of a fat set of new race carbs and the trick ignition though! Muchos dollar I expect too!
Saying that brand new carbs is never a bad idea on on old bike, and should once dialled in allow nice crisp Carburation and be easier to set up than a possibly worn set of secondhand TZR carbs, that might well have been messed around with or butchered over the years.
That's why I went for a new carb to replace my 30year old Mikuni VM26 too.
You should see some healthy gains from all those bits once set up too! |
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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Posted: 14:59 - 15 Nov 2016 Post subject: |
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stevo as b4 wrote: | The race crank looks pretty damn cool, but it's outdone by the sheer bling of a fat set of new race carbs and the trick ignition though! Muchos dollar I expect too!
Saying that brand new carbs is never a bad idea on on old bike, and should once dialled in allow nice crisp Carburation and be easier to set up than a possibly worn set of secondhand TZR carbs, that might well have been messed around with or butchered over the years.
That's why I went for a new carb to replace my 30year old Mikuni VM26 too.
You should see some healthy gains from all those bits once set up too! |
It's touch and go if I can finish it before I drop into poverty and starve to death.
There were several sets of TDR / TZR carbs on egay, none of which were very good and all were about £100 a pair or more. Currently I'm figuring out what to do about clocks etc. ____________________ Be a REAL MAN! |
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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stevo as b4 World Chat Champion
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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Old Thread Alert!
The last post was made 7 years, 169 days ago. Instead of replying here, would creating a new thread be more useful? |
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