Another Yamaha SR250 (1981) cafe project

[bartbrn]

...but I'm going to do the kohler reg/rec mod anyways. LI is just too expensive to risk blowing

Can you tell me about this Kohler reg/rec mod, and what forum that's from? -- love this forum, but sometimes one needs to look around for particular technical issues.

 

[bud.]

Briefly touched on here…
http://www.dotheton.com/forum/index.php?topic=37447.0

And a ton of info from honda twins here…
http://www.hondatwins.net/forum/viewtopic.php?f=46&t=14530

 

[bartbrn]

Thanks for the all the info! Has anyone tried the Sparx Battery Eliminator W/Capacitor? Though I'm keeping the SR-250's electric start, and thus will still need a battery, this Sparx unit looks like it may be a better choice than the original 32-year-old regulator and rectifier. Any opinions appreciated!

Peace

Bart

 

[carnivorous chicken]

This may sound like a dumb question, but consider the source. My SR-250 has a 34mm Mikuni CV carbureter, perhaps Mikuni model BS34. I'm going to get rid of the whole airbox assembly (unless someone thinks it's a good thing to keep -- I'd like to replace the regular lead-acid battery, and replace and relocate a LiIon battery to the space taken up by the airbox). Given that situation, would it make any sense to equip the 34mm Mikuni with a velocity stack, and enclose the velocity stack within a K&N-style filter, or is that just a waste of time and effort?

Thanks!

Bart

Although most folks around here don't recommend pods (much less stacks) for diaphragm carbs, I run my SR250 with a pod filter. It's a single, so takes the multiple-carb air flow consistency problem out of the equation. That being said, I wouldn't recommend a velocity stack. A pod will work, but the stock airbox on SR250s is very restrictive, and you'll find you need to go up several jet sizes to get it right, with whatever exhaust you use part of the equation.