KTM 85cc Motard build

[ringo]

Yeah my acewell kit has the speedo pickup! Plus water temp, tacho, and records max speed, max revs and a few other things that you can check at the end of a session to help with gearing!!

Man!!! That bike above has some chunky forks Mr Mo!!! Got me thinking about a cheap set of 125gp forks but it will be a tarmac bike only after that!!!

 

[grnman]

Have you watched his youtube video yet Ringo?

 

[ringo]

No youtube at work an forgot last night, I have seen some of his earlier stuff.... LOLOLOL!!!!

 

[motard_16]

ive only got mine to 9,700 rpm in the short time ive ridden it. so its got alot more left. i must have been shifting at about 8,500 when i first rode it.

i dont know if you've got it but you can get a magnetic pickup for the speedo on the Acewell. i put one on my big motard.

my moriwaki revs to 14-15 and thats with stock igntion and flywheel u can get ignition kits for them that are like a inerrotor ps i just brought a moriwaki 250 they do the isact same times a superstock 600 at broadford

 

[grnman]

wow man, a 15yr old kid on a 250 is crazy. is it a single or twin 250 like the RGV 250? that is going to be so much fun. sounds like a whole new learning curve engine and riding wise going from a 80cc to 250cc.

 

[ringo]

Even if you could get the ktm to rev to 14-15 I would be even more worried about the fragile big end than I am now!!! I believe it though, I've built 50cc engines that rev to nearly 19,000 rpm so 15k should be easy......... Just before the big end goes pop!!!

 

[motard_16]

wow man, a 15yr old kid on a 250 is crazy. is it a single or twin 250 like the RGV 250? that is going to be so much fun. sounds like a whole new learning curve engine and riding wise going from a 80cc to 250cc.

Umh your phone must of went flat give dad a ring or he will ring u tomoz Umh Moriwaki 250 its a 2009 rs 125 with a crf250 motor they beat most super stock 600s there fast as **** I'll be racing that next year very expensive little bikes and 14 yr old 50kgs aha

 

[ringo]

MAAAAANNNN....... I just spent the whole day stalking a YZ250 2 stroker on the 85SX!!!! What an awesome machine.... Sooooo much fun!!! Front brake held up!!! Need harder front springs and a bit more bite in the front brakes but other than that she's sweeeeeet!!!!!

Action pics to come, knee dragin!!!!

 

[grnman]

that sounds amazing!!! i told you the big bikes would be in trouble. your face must be sore from smiling. how did you like the CST slicks. not a bad choice for $60 a pop hey. i think you run a 3.0Nm front spring as stock and the hardest i have sourced is a 4.0Nm plus a few more preload spacers. that will cost you $120 plus about $70 postage i think.

how much more room is there on them to move around compared to your other pitbike. big ****pit hey.

is it quicker that the Elites around the track?

 

[ringo]

Yeah will investigate springs???? Have you found any preload adjusters that fit in the top of the fork, I was so disappointed when I went looking for the preload adjustment only to find it didn't have any????

Wasn't anyone lap timing but it would be very close..... The 14/49 was pretty much perfect gearing for this track!!!! Just starting to peak 6th at 2 points around the track!!

 

[grnman]

i imagine the preload spacers would be something you'd just get from a KTM dealer.

 

[ringo]

Pics as promised:

 

[grnman]

Ringo's bike (at the moment......)

 

[ringo]

Next job on the list is shortening the front fender, the 12's make it look even bigger than it already is!!!!

 

[Mr Tarded Mo]

Yeah, front fender looks like a forelock on the bodybuilder. Everything else is sweet!

 

[grnman]

The front brakes are nearly there. still waiting on the KTM 125/200/250/300/450 caliper to arrive which should bolt straight onto the mounts. its going to be a killer setup when its done. you could not fit a bigger disc than this. not even 5mm bigger.

Then i think a YZ85 or CR85 brake line would be the correct length and have the right size bango bolt for it. i think the master cylinder only has to be 12mm piston or above.

check out the port difference between the KTM and my scooter barrel.....

 

[Georgalis]

pics are sweet

 

[louis2999]

thats so sick man

 

[grnman]

OK, so you want to make your Honda CR80 go faster and produce more power

Ensure that the motor is in good shape:

New piston, new ring, the ring and bore clearance is 2 thou of an inch maximum

At this point with good jetting and a nice busicuit brown plug electrode you should see 20hp

This is what you do:

1. Bolt on an FMF Fatty Pipe

2. Put on a Keihin flat slide carburettor

3. Add a V Force reed block

You now have 24 hp and the start of a weapon

4. Run the biggest barrel possible - 85cc

5. Change to a race fuel - VP109 will give you another 1 hp

6. Machine the head to suit the high compression levels required by VP109 - research the net for this one

7. Machine 2mm - 4mm off the back of the cylinder inlet manifold to increase the crankcase compression - you now have 26hp

8. Add a Vortex programmable ignition

9. Read Eric Gorr's tuning tips and get the transfer ports altered - you now should have 28hp

10. Learn how to ride the bike with the throttle wide open at all times

 

[ringo]

My disc has arrived "work of art" , my sx 125 front caliper is here and the 4n/mm front springs!!! I think the only parts that will go in before Sunday is the springs and probably without a fork oil change :/

Also eyeballed your SXS CDI Greeny..... Looks like new mate!!!!
I'll run it back to back with the standard unit on Sunday and let you know the results!!! Then I might send it to you..... LOL.