790R....Here We Go Again

As Good or Better Than Riding?

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1coolbanana
Posts: 1949
Joined: Wed Sep 23, 2009 5:14 pm
Location: NW Sydney

Re: 790R....Here We Go Again

Post by 1coolbanana » Tue Mar 17, 2020 1:00 pm

Did a little fiddling with the shock, hopefully an improvement

Heading out for another 1000 km weekend, see how all the little mods pan out :D

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Cowabunga dudes .......

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Uncle Dave
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Joined: Fri Jul 17, 2009 7:51 pm
Location: Blue Mountains NSW

Re: 790R....Here We Go Again

Post by Uncle Dave » Wed Mar 18, 2020 6:42 pm

:clap:
2010 Yamaha XT1200Z Super Ténéré
1989 Yamaha XTZ 850 Super Ténéré
1988 Yamaha XT600ZU Ténéré
1983 Honda XR 500
1978 Yamaha TY 175b

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1coolbanana
Posts: 1949
Joined: Wed Sep 23, 2009 5:14 pm
Location: NW Sydney

Re: 790R....Here We Go Again

Post by 1coolbanana » Wed Apr 01, 2020 12:14 pm

After 3 days of goodness, 1400 km, the forks are a huge improvement.
Wont be making any more changes until the shock is done as its hard to tell if I can improve the front anymore until the rear is a bit more sorted.
Next will be the shock as it really can give you a good kidney punch every now and then and looses traction on especially the up and downhill corrugations.

Other news...the oil leak is fixed :D
Dash, not so sure, thought I saw some small signs of condensation :(

So glad I got rid of that shit front tyre and got the wheel running straight and true, what a difference :thumb:

Some great riding was had and the 790 is really proving to be the best tool for the job that Ive ever ridden.

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Cowabunga dudes .......

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1coolbanana
Posts: 1949
Joined: Wed Sep 23, 2009 5:14 pm
Location: NW Sydney

Re: 790R....Here We Go Again

Post by 1coolbanana » Wed Apr 01, 2020 4:59 pm

So its been 2500 - 3000 km now since I drilled the oil jet for the clutch
Originally when I had a look (on page 2) it was fairly dry, you barely got oil on a rag when wiped and barely any visible oil inside the hub or on the plates.
This has been sitting undisturbed since last Saturday.

Nice and oily, dripping oily :D
Plenty of oil in the hub, and on the plates :thumb:
Still isnt heaps but at least now its lubed and cooled well.
Happy knowing its got good oil flow and unlike 9XX, its made no difference to finding neutral.

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Cowabunga dudes .......

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Fastredrover
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Joined: Sat Apr 04, 2020 9:44 am
Location: Coffs Harbour

Re: 790R....Here We Go Again

Post by Fastredrover » Sat Apr 04, 2020 10:10 am

Hi there
Another 790R owner here. I only weigh 72 kg + gear. Short 55 year old. :chair:
Am a tinker like you & rather do it myself & understand what’s going on.
Can you share the fork shim stacks you are Currently happiest with.
Am thinking about Shuffling some shims.
I use the ReStackor Pro software so interested to seen what you have done.
I’m following your struggle on the Adventure rider 790 R site also

Did you do anything with 7K Machine?
Have you sent the spare rear shock anywhere yet?
I have used FFRC in Qld before. They supplied the longer shock shaft for Torque/ADV Ronski.
Might speak with them shortly to see if they have been working with the 790 R.

Thanks

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1coolbanana
Posts: 1949
Joined: Wed Sep 23, 2009 5:14 pm
Location: NW Sydney

Re: 790R....Here We Go Again

Post by 1coolbanana » Fri Apr 10, 2020 10:54 pm

I did want to remove a little installed preload from the springs but they only use 4 mm total spacing.
With 14 mmm installed preload which gave me nowhere to go at this point without some machining which I didnt want to do at this point.
Theres still too much installed preload that gives harshness, this is a big problem for the harshness, needs 8-10mm max.

As far as valving, I removed the 0.15 HSC shims from the base valves and replaced with 0.10 mm to soften the high speed comp.
Midvalve, I created a more progressive and softer stack on the compression side and added a crossover shim in the face shims.
Rebound side I left as is but added a crossover on the delta shims.
Still a work in progress but dont want to do anymore until I manage to put less installed preload on but that will require some careful machining.
After that I may flip the midvalve and try something else.

This is all with me at 95kg and travel light so at your weight youd want to start with softening up heaps and lighter springs.
No idea about the Stackator software.
Shouldnt that work out a suitable stack for your weight?

Didnt do anything with 7K as its sounds like an expensive half arsed workaround by only doing the one midvalve but cant say really other than to say, nah!

I took a leap of faith and sent the spare shock to MPE, fingers crossed but they do have their own 790 and have spent a fair bit of time with it sooooo..... :ne_nau:
Last thing I want to do is make it taller, 240 mm each end is good enough for me.
Cowabunga dudes .......

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1coolbanana
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Location: NW Sydney

Re: 790R....Here We Go Again

Post by 1coolbanana » Fri Apr 10, 2020 11:08 pm

Bit more mucking around with all this down time and I shortened the inlet snorkels.
They are so long, restrictive and in the worst possible dust sucking area.
Shortening will make them a lot less restrictive with the same filtration of the prefilters.

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Normally they extend right up the back

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Now they are further forward

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Cowabunga dudes .......

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1coolbanana
Posts: 1949
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Location: NW Sydney

Re: 790R....Here We Go Again

Post by 1coolbanana » Thu Apr 16, 2020 10:30 am

During lockdown, I thought I do some airbox experiment and designed this new lid.
Open up the top of the airbox and prefiltering in addition to the snorkels and their prefilters.
Should breath a lot better and will also have quick change prefilter underneath

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Cowabunga dudes .......

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1coolbanana
Posts: 1949
Joined: Wed Sep 23, 2009 5:14 pm
Location: NW Sydney

Re: 790R....Here We Go Again

Post by 1coolbanana » Thu Apr 16, 2020 9:47 pm

So the first attempt came out nice and nearly spot on for fit.
Quite chuffed with it actually.
Just a couple tweaks to do and try it out.

Original airbox lid

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New design open airbox lid that will sandwich the filter media to give pre-filtering just like the snorkel socks.

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This will of course be pre-filtered same as the snorkels.
At the moment I only have black filter media and waiting for the red stuff like the snorkel socks

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Cowabunga dudes .......

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1coolbanana
Posts: 1949
Joined: Wed Sep 23, 2009 5:14 pm
Location: NW Sydney

Re: 790R....Here We Go Again

Post by 1coolbanana » Fri Apr 17, 2020 12:43 pm

A few design tweaks made on the foam retention sizes and a few other detail bits.
Hopefully filter foam gets here soon.

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Cowabunga dudes .......

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