Sr125 build help!

Hello fellas... Been a while... Got good news.... The monster is alive!!! I'll send some pics over shorty and a video for u, especially for all that helped and replied to my newbie messages....one question before takin her out on a spin.... O have an AC motor... Currentl got the plastic that go over the cylinder but plastics around the flywheel is currently on backorder... Also I have a lightened flywheel die by shiny.... Would it be safe to run it without the plastic shroud that goes over the fan? Also is it necessary to put the fan over my flywheel while running?

 

no fan is unsafe for prolong useage i guess, as there is no fan to pull in the air to cool the block

 

Progress pix cuz every1 likes pix... Mostly mock up to get an idea how how I want the stretch to be








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its gettin closer and closer but been super busy... ill have more time this week.......hope u guys enjoy....lots more to come.... N oh yeah.... She's alive!!!!!

 

what rims are those? looks light and very nice!!

 

very nice fella PORN

 

thanks minor for answering......now i wont take a piss while riding......haha......nah i got the idea......well sorta......lets just say i have a fan, head cylinder plastic but no fan cover??? thats the part im missing......seems like enough air feed but.... oh and these wheels are called wagon wheels....they come without a hub so im gonna have to fabricate something in the machine shop to make the rear work.........oh yeah......all of a sudden i stopped getting spark......it has been running fine during a few test runs....i stopped the bike to let sit while working on a friends bike and when i tried to start it up again it didnt start.....checked spark and seemed to mis-fire then eventually zero spark...could i have fried my cdi? stator seems fine....both yellow wires giving current...all pick up wires showing signal to my probe but still no spark

 

haha.......PORN!!!

 

might stating the obv but have you tried a new plug first

 

Nah changed out plugs and coil plus i checked the stator... After a short wait (. 15-20 mins) in between cranking the motor I would get 1 spark which causes a back fire effect.. If I crank again immediately then I get no spark... It's weird but I had similar problem b4 with a minarelli motor thatused the ducati cdi...changed the cdi and jackpot...it may be something else but I have a good feeling the cdi is fried... Possibly bad ground ? I dunno

 

:grin: Hey it's been quite some time.... Been busy! Thanks for the advice minor.... I actually went n got me another malossi cdi and as soon as I pressed the starter button "BAM!" turned out the cdi I had before probably got grounded or shorted somewhere in the millions of wire I cleaned up.... Since then I've been workin on mellow cruisin n breaking in my mildly built motor... Here's a lil pic update..

she's nice and torquey yet zippy at the same time.... Wish I did it rite the first time and had it shipped to u minor b4 it was shipped to the USA but soon enough I'll need to take this motor apart and let u work ur magic.... :thumbsup:

 

Btw she had plenty more to give.... I gunned a quarter mile stretch n ran into an intersection.... Can't wait to test my top speed on a free straight road instead of doin this on a city street again haha.... I kno some of u uk guys are breaking 100 mph and I hope to as well but I can't lie.... I was shitting bricks at 78mph lol

 

Can any1 lead me to a source for MHR variator? Or part number... Part number is 5111258. Its the only one available. I can't find the mhr number

 

thanks terro.....shoudve asked this question back in june.......ive been on the hunt for that "MHR" variator since then.....haha.......

 

Why not "listen" to what Dwarf recomend, and use a Polini variator?
I have heard that Polini ones work best in this engine.
(Even PM Tuning recomend them,and their own type is based on the Polini as well)

"Polini variator set to 180 spacing and Polini 180 belt"

http://www.scootershack.co.uk/viewtopic.php?f=23&t=17789&p=205481&hilit=Polini+pm+variator#p205481

 

looks like i will look into the polini as well......yeah......i took a lot of advice from pete and have been very happy so far.... btw.....should i go with an aftermarket clutch since im gonna order soon? i see that theres polini, malossi, and dr. pulley on the market......

 

antoher thing.......minor.......i noticed in another thread a guy bought the wrong dell carb......im looking for a 25mm dell now since my 28 pwk is drinking gas like crazy....i like the performance of course but for daily cruising not too ideal......im sick of pulling over every 20- miles to dump gas since the honda ruckus only holds 1.3 gallons.....so if you can lead me the right way i promise i wont purchase the wrong carb from pm tuning lol...