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Nannos accumulated TR1 findings (and blatant show off)

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Re: Nannos accumulated TR1 findings (and blatant show off)

PostAuthor: Ita » Sun Aug 18, 2019 9:51 pm

So much interesting info here. I was considering a 2 - 2 exhaust a-la Ducati but the 2 - 1 - 2 looks great...

Ita
I'm a black bat baby,
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I need my high octane.

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Re: Nannos accumulated TR1 findings (and blatant show off)

PostAuthor: nanno » Wed Nov 20, 2019 1:30 am

16689

How to convert one of those generic Suzuki Samurai, Swift (Geo Metro) starter solenoids for use on a XV1000/1100.

All you need is a bit of M4 all-thread and a nut. Now if you're really fancy, you could drill and tap a hole on the other side and affix it to the block like a stock solenoid, but I never found that to be necessary in the past. Also these solenoids seem to be better made than the caltric-ones for XVs, one of which has just failed again and caused this swap.(My loss, your gain, this time I didn't forget to take pictures. :cl: )
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

*Look to my profile for a link to my blog*
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nanno
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Bike year & model: 1981 Yamaha TR1
1982 Yamaha TR1 Turbo
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Re: Nannos accumulated TR1 findings (and blatant show off)

PostAuthor: ro7939 » Fri Jun 26, 2020 3:55 pm

nanno wrote:Yes, because the smaller combustion chamber raises the compression to around the 10:1 mark and the smaller ports help with low-end gasflow.


Very interesting.

In your specific application (750 head > 1100 motor), can valve sizes other than the OEM 750 valves simultaneously increase power without narrowing nor lowering the torque curve? If yes, smaller or larger? What valves? Are valves from a specific bike ideal? If yes, which bike?

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Re: Nannos accumulated TR1 findings (and blatant show off)

PostAuthor: nanno » Fri Jun 26, 2020 4:03 pm

If you go bigger on the valves you basically end up, where I was with the welded up TR1/XV920R heads, which worked nicely but moved the torque curve up further. Using even smaller valves will really start to kill power on the upper end of the rev-range, so I would recommend against it as well.

There should still be a for-sale-ad for a set of welded up TR1 heads from me in the for-sale section of this forum, if you fancy going down this route.
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

*Look to my profile for a link to my blog*
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nanno
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Bike year & model: 1981 Yamaha TR1
1982 Yamaha TR1 Turbo
1977 XS 750 Sidecar
1984 XT500 4Valve (Austrian Tax saving edition)
1979 RD250/R5/DS7-hodgepodge (in bits)
Sex: Male


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