our bike is a bit different than the 10r. if they will flash it but still keep the oem rev limit intact, go for it. if they say they have to bump it up some, stay away. if you bump the rev limit on our bikes above the stock limit without replacing the intake springs with stiffer HRC parts, you WILL float a valve.
I can see that happening. So we need to make sure they keep the rev limit? good info because I've been toying with maybe flashing my ecu. but I don't want to be one of the first guys, the guinea pigs haha. I've heard the flash on the CBR doesn't really make a huge difference overall but hopefully someone can chime in otherwise.
I had my ECU re-flashed by ECU Unleashed with the higher rev limit and didn't have any problems, though the rev limit only went up about 400 rpm to 13.5k. I can't say how much power it made, never had it dynoed but it ran good. At least until the rings/cylinders were so bad the engine didn't have enough compression to start. It also burned about a quart of oil/track weekend. No more Hondas for me...
you still have the 08? did you get a compression/leakdown done on it? 400 rpms isnt a lot but it can/will cause issues. you can go all the way up to 15k with springs, but the crank dont like anymore over 14.5k.
I had two CBR's, an 08 track and a '10 street bike. I switched all the track parts over to the 2010 and will use it for a while. Next bike will be an S1000RR or ZX10.
Tight valves will make a bike damn near impossible to start while hot but will start when cold. You'd also lose compression and a whole miriad of problems.
^ then why dose hot oil feel thiner than cold. For instance oil from a hot motor drains faster than that from a cold motor. And cold straight is thicker that hot. First had experience when I tried to fill the front pumpkin on my blazer when it was 20 something outside. Put the oil inside for a night flowed right in.....
There is a diagram that didn't come through when I copied/pasted but you can see it at the link above.
Changing Viscosity with Additives
VI improvers change oil blends so that they maintain a more constant viscosity over a wide temperature range. The additives that act as VI improvers are generally long polymer chains that are coiled like a spring. When an external shear stress forces the blend of oil and polymer chains to flow, the coiled polymer chains that are suspended in the oil become stretched and distorted to an extent that they impede the oil flow. But impeding oil flow has the same effect as increasing the oil viscosity and thus the blend has a different viscosity curve from the unmodified oil.
A polymer that changes the viscosity index is called a VI Improver. They most commonly are long polymer molecules with a molecular weight of about 100,000. When a suspension of these polymers in oil is heated, the polymer molecules expand and make the oil behave in a more viscous manner. When the same suspension is made to flow under the action of a shear stress, the molecules interfere with flow as explained above. This also causes the blend to behave in a more viscous manner.
Summarizing, the polymer and oil behaves:
In a more viscous manner
As the temperature is increased
As the shear rate is increased
In a less viscous manner
As the temperature is decreased
As the shear rate is decreased.
Note from the diagram below that this yields a High VI oil, which is desirable for most applications.
Some additives, particularly those with smaller molecular size, can change the viscosity index or change the viscosity curve in a manner that can be negative to the system performance
Didn't remove anything, when I refreshed it was gone. Would have said "This message was deleted " if I did. Don't know what happened but I reposted an answer for you. That's why new oils are multi viscosity so it's thinner when cold (easier starting, better flow) and thicker when warm. You can't compare 90 weight diff oil with motor oil.
Snick ... heard you were ok. So I will take that as good lookin' out. And yeah I "am" an old fart probably to most of you guys. But I am still a bad motherfucker. Talk is cheap. I see you are in N.C. ..... I will be at NC Bike, March 15th and 16th with Team Promotion. If you go, swing over to our tent. Call (610) 235-3696. Show you how old I am. Bring your girlfriend/cheerleader THEPFAFF with ya. Seriously tho' ... I hope yous laugh at this. Let's chill out and move on and be prductive on this site. If offended, my apologies. Do hope to see you at N.C. Bike. Peace out Dude.Lol ...... the old fart Joe. Later :th_salute:
i had pcv installed ,getting it dyno tuned in 2 weeks ,i just found a company local to me whom can reflash the ecu for me ,can anyone tell me from experience .Do i need to do anything to the motor to make it stronger ?valves etc .
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