SuperMegaCrazy 690 build thread!

[Kawidad]

I'm in too.

I think your plan as outlined is sound and completely workable. I like it.

[LoneStrom]

Subscribed!

I've been waiting for awhile for someone to do this. Excellent idea, and I'm very much looking forward to your build.

[Evil Invader]

HellYea!!
I´m soooo in for this one!!

[crankshaft]

Cool, more people onboard Today was a good day.....



The Microsquirt ECU showed up today

Had a conference call with Matt, my EFI Guru and we have a concrete plan.
We've decided to retain the stock throttle body and injector for simplicity but we've agreed that a few of the key sensors will be changed in favor of a more off the shelf type as discussed before. Intake air temp and coolant temp will be a GM or a Bosch sensor (Depends on the thread pitch of the sensors) and we'll use either a GM or Honda (car) MAP. I'm not a big fan of the integrated MAP/TPS set up on the stock throttle body honestly.

The nice thing about this approach is that if any of you 690 folks want to go this route, you'll be able to use the same harness and ECU settings and the basic map will work. All you would need to do is change our a few sensors and you could be in business.

The 690 heads to Boston on Friday morning, so Matt can start the harness side of the project. I'll be heading down at some point to help as needed.
Our goal is to have it running and ready for some real world trail testing by Nov 16th. Some friends of mine are heading to Hatfield and McCoy that weekend to trail ride and hang out. I think H&M is a great venue for testing with it's altitude ranges and of course all kinds of different trail types. After that, we'll refine and then I'll be prepping for the ice race in WI in January.

[Yellow Pig]

Out of curiosity why not convert it to a carb and keep thinks simple and reliable?

[bobzilla]

cause thats easy and old skool

[crankshaft]

Originally Posted by Yellow Pig

Out of curiosity why not convert it to a carb and keep thinks simple and reliable?

Why not walk to work and carry your lunch in a fabric sac?

[Noyah]

Originally Posted by crankshaft

Why not walk to work and carry your lunch in a fabric sac?

Rofl :

Sent from my HTC One X using Tapatalk 2

[Assfault]

Originally Posted by bobzilla

cause thats easy and old skool

It would figure then if it is easy as you say, more bikes other than the handful of Rallye bikes would of converted by now. And with all the problems these FI systems have on these bikes, perhaps Old School Carburators might be a better solution than what they came with. From my investigations into doing a carb conversion, it will take as much work if not more to convert to carb as this threads FI conversion project. Keeping the TB negates many parts. Changing the air box/battery area doesn't really NEED to be done, it looks like the OP wants to do that. So quite a bit of work could be avoided right there. So IMO it would seem to convert to a different FI system would be easier, as less parts are required to be changed and sorted out.
There is always going to be a compromise, whether it is FI or Carb. Does one want the simplicity/reliability of a carb system and the accompanying jetting issues, or go with the FI and risk high pressure pump/injection problems.
Each rider needs to do what they think is right for them, and what might work for somebody might not work for the next person. As far as what is best, thats like asking what oil or tire is best, one will get a myriad of responses.
So in the end, I applaud any effort into making these bikes not necessarily work better, but more reliably, as this is the goal for both types of conversions.

[transplanted]

Good luck! Subscribed.

[Garthe]

I thought these bikes came, 'ready to race'...

carbs or EFI, oh my...

[crankshaft]

Even a carb conversion would require a pump, don't forget that potential issue. The only KTM's with carbs that have proven reliable, have been the gravity fed carby bikes. I had to replace two 950 pumps over the years and know of many more. My 640 carb was a pain in the ass, I probably pulled it out 1000 times People tend to run away from what they don't understand, Fair enough, comfort level is important when you're stranded.


Nothing is 100% reliable, just my feet

[crankshaft]

Originally Posted by Garthe

I thought these bikes came, 'ready to race'...

carbs or EFI, oh my...

Yea, just like a Japanese bike I would rather push a 690 than ride an XR650.
Speaking of an XR650, one blew up on the first day of the Mexican 1000......
Must have been the fuel injection

[bobzilla]

Originally Posted by Assfault

It would figure then if it is easy as you say, more bikes other than the handful of Rallye bikes would of converted by now. And with all the problems these FI systems have on these bikes, perhaps Old School Carburators might be a better solution than what they came with. From my investigations into doing a carb conversion, it will take as much work if not more to convert to carb as this threads FI conversion project. Keeping the TB negates many parts. Changing the air box/battery area doesn't really NEED to be done, it looks like the OP wants to do that. So quite a bit of work could be avoided right there. So IMO it would seem to convert to a different FI system would be easier, as less parts are required to be changed and sorted out.
There is always going to be a compromise, whether it is FI or Carb. Does one want the simplicity/reliability of a carb system and the accompanying jetting issues, or go with the FI and risk high pressure pump/injection problems.
Each rider needs to do what they think is right for them, and what might work for somebody might not work for the next person. As far as what is best, thats like asking what oil or tire is best, one will get a myriad of responses.
So in the end, I applaud any effort into making these bikes not necessarily work better, but more reliably, as this is the goal for both types of conversions.

Cranky has been dealing with these issues since 09 and helped many of us and we have had a 3 year long debate over carb/fi
I did look into carb seriously but the main thing that held me back ws the cdi was from from eastern block area and I had no knoweledge of the people or quality and spare parts availbility. Factory carb stuff is out of my price range.

knock wood i think i have had every problem and know the symptoms...biggest problem is that so many issues mirror each other in symptoms.......bike dont run!

[Garthe]

Originally Posted by crankshaft

I would rather push a 690 than ride an XR650.

Looks like you've had or will very soon have, that opportunity...

Excuse me, while I go spend my extra money/time on rear tires, gas and riding...

While you try and reinvent the wheel...

What a waste of time and money...