705 Kit - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

 
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Old 07-16-2013, 02:15 PM Thread Starter
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Join Date: Oct 2012
Location: Emmett Idhao
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705 Kit

I have a 2008 KLR that is closing in on 25,000 miles and yes, it is using a bit of oil. Not a whole lot but I think that it may be about time for bore job. I am thinking of going whole hog and having the 705 kit installed but as you all know it is considerably more expensive than the 685 kit. And there are different levels of 705 kit too from the tame to the not tame at all. So....I'm wondering what is the best level to pursue? Those of you that have gone the 705 route are you happy with it or is there something you wish you would or would not have done? I would like to keep using 87 octane fuel if possible but if necessary I can see putting in the higher voltage stuff if the rebuild (meaning high compression piston, cam, bigger valves) is worth it.

So what say you? What route might you suggest?
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Old 07-16-2013, 02:57 PM
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Watching this as my brother is in the same boat (2008 burns a quart+ of oil every 1k miles). May do the 685 or 705.
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Old 07-16-2013, 11:20 PM
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Location: Pefferlaw,Ontario
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From personal experience...I would go for the 685 and a stage II head. That is 1mm larger valves and some porting in the head for better flow.
The best kit I had was the 685. I have gone from 650to 685 to 688 to 705 all with a fully modded head and cams.....nothing performed like the first 685 kit. The 705 is not imho worth the extra coin, spend it in the head.

Willys
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Old 07-16-2013, 11:41 PM
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Quote:
Originally Posted by willys View Post
That is 1mm larger valves and some porting in the head for better flow.
And, exercise care when porting, not to grind through into the water jacket, right?
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Old 07-17-2013, 08:06 AM
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Hmmm....?

Head porting is an art and requires knowledge or past experience to get a positive result.......I haven't heard of anyone cutting into their water jacket in the past 6 years. I did hear of someone doing it before that. The head was garbage afterwards. The porting requires specialized tools also.
If you have no past experience doing it it is probably best left to someone who has experience.

I have done many heads on many vehicles and it takes care and patience to get it right. It is easy to open it up but it takes experience to get the charateristics correct for correct flow improvements.
It is also easy to ruin the flow charateristics if you do it incorrectly.

So take extreme care if you try and do your own porting job. Heads are now very expensive.....

Willys
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Old 07-17-2013, 09:09 AM
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Quote:
Originally Posted by willys View Post
I have done many heads on many vehicles and it takes care and patience to get it right.
Use a FLOW BENCH?

------------------

KLR Cary was once in contact with someone who ground through his water jacket . . .
Damocles is offline  
Old 07-17-2013, 11:44 AM
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Instead of trying to make me look bad as usual why do you not try and help the original poser and not destroy his thread as usual!

This is why you are known as the site troll!

Stop trying to debate eveything and help the OP with some first hand experience and not stuff you find written somewhere.?????

For once do the right thing and help not hinder!!!

Willys
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Old 07-17-2013, 02:33 PM
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Join Date: Mar 2012
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I think that the porting I had done was probably the best bang for the buck, and it wasn't cheap.
I personally don't think porting is an art, it is a meticulous science. Without a flow bench you are grasping a straws, flying blind. Some think more is always better but that is not the case with your head, you can easily disrupt the flow and actually decrease your performance.
I would not let anybody touch my head without documented success and access to flow bench data from their previous work and the bench data from the head they do for me. Just grinding away is fool hardy.
For a big bore kit I would contact Eagle Mike for his new piston design. I hear he has lightened the piston and an improved design. He will give you a knowledgeable lowdown skinny.
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Old 07-17-2013, 06:01 PM
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+ 1, SkiBumBrian!

Porting with the use of a flow bench quantifies, measures the improvement in flow obtained from the process.

I, too, would have more confidence in a porting job backed up by data from flow bench runs, than from one "ad-libbed" by a shade-tree mechanic with no instrumentation, no matter how grandiose his unverified, untested claims of proficiency.

That said, it's still Rustydust's bike, and he's the only one to be satisfied with how his head is ported. I share my preference for a flow bench, and my reasons; his choice and the reasons for it may be entirely different, but remain just as valid.
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Old 07-17-2013, 06:56 PM
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Willys
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