It’s not a match for those with a possible exception of a very early XS750. What was redline on the two stroke street bikes?
-
Enjoy XS650.com? Consider making a donation to help support the site.
XS650.com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going.
1974 tx650a Hotrods316
- Thread starter Hotrods316
- Start date
My '74 RD350 was 8500. Didn't have the brake lining sensor either
Yes, I think very early XS750 was 9000 redline.
But I think the winner is...1974 TX500, and I think @DogBunny has one for sale!
That’s an Eleven Special tach. 1980/81. All of the 78/79 XS bikes are the same design with their minor differences. I believe the tach in question predates 1980 and does not belong to a Special. AFAIK, the 1978/79 XS750 had a 9,000 rpm redline.
The 1976/77 XS750 redline was 7500.
As I mentioned...
I'll take your word for that!
Just seems unusual that with the same basic engine, the redline jumps from 7500 to 9000 (+20%) 77-78. Of course there are changes year upon year due to cam changes, etc., but this would often fall in the range of 500 RPM; a jump of 1500 RPM is quite something, and I would think a lot of other mods might have to happen in concert i.e. bottom end, rods, ???
Hotrods316
XS650 Member
Dang here I thought I had me a 12000rpm twin
I can tell you riding mine yesterday, he did not feel like he was ready to rev to 12,000!
Hotrods316
XS650 Member
It sure seemed strange to me when I first looked at the redline
All I was thinking was woohoo “the magic happens above 7000rpm” we need a great movie like that but got for motorcycles
All I was thinking was woohoo “the magic happens above 7000rpm” we need a great movie like that but got for motorcycles
Hotrods316
XS650 Member
I can tell you riding mine yesterday, he did not feel like he was ready to rev to 12,000!
I hear that!! lol I’m excited to just ride this one, the more I stare at it the more pumped get. Might even make my deadline goal of newsies flat track reunion on the 20th
Grew up in Columbus... definitely remember the Charity Newsies!
I’m excited to just ride this one, the more I stare at it the more pumped get. Might even make my deadline goal of newsies flat track reunion on the 20th
It’s my understanding that there were in fact engine updates that led to this.
I didn’t research this as if it was important, so I did no cross checking. Take my XS750 information to the bank at your own peril.
No, I think you are correct. I have seen 7500 AND 9000 redline tachs, both attributed to XS750, so it seems very likely although, like you, I did not do a deep dive.
Edit: That said, the all-knowing Google AI agrees!
Drum rear brake it seems from the warning light? RD 125, 200 maybe?
Weren't all XS750 triples disc rear brake? Did any rear discs have pad wear indicator fitted? If so, yes could be 750 triple.
Yes, I think all XS750 were rear disc.
And I also think this is the answer: 1974 TX500, maybe also 1975 XS500.
Hotrods316
XS650 Member
Ok next dumb question… just to clarify my brain. If I disconnect the plug/connector coming from alternator it won’t hurt anything right? Because the alternator requires the 12v volt field to begin a charge right?
Just going to run total loss for the shakedown runs, the harness is junk and will eventually rebuild with the steps from the reg/rect thread.
Might also go with electrex system it I decide to go race only, but haven’t decided on if it will see street cruising yet…
And btw thanks for help with tach. Unless someone with a 12000rpm XS needs a tach
Just going to run total loss for the shakedown runs, the harness is junk and will eventually rebuild with the steps from the reg/rect thread.
Might also go with electrex system it I decide to go race only, but haven’t decided on if it will see street cruising yet…
And btw thanks for help with tach. Unless someone with a 12000rpm XS needs a tach
I would unplug the regulator too just to be on the safe side. Don't think total loss will work very long... ignition likes strong battery.Ok next dumb question… just to clarify my brain. If I disconnect the plug/connector coming from alternator it won’t hurt anything right? Because the alternator requires the 12v volt field to begin a charge right?
Just going to run total loss for the shakedown runs, the harness is junk and will eventually rebuild with the steps from the reg/rect thread.
Might also go with electrex system it I decide to go race only, but haven’t decided on if it will see street cruising yet…
And btw thanks for help with tach. Unless someone with a 12000rpm XS needs a tach
Hotrods316
XS650 Member
Yes my thoughts exactly. I figured I should be good for a few runs before the battery gets too low. I started unwrapping the “stock” harness and found oh so many cobbles, twist connectors bare wires solder joints and bad crimp on connectors, I was like man someone done hacked on this ole cinnamon “brown sugar”
I’ll look at charging system/rebuild/upgrade options after the newsies. I know if I started that whole process I would miss the event and then let the whole project spiral to oblivion lol. Lest I know thyself!
Thanks again
Similar threads
