What was your top speed with stock ECU and exhaust? If you didn't check, put everything back to stock and make a baseline run so you'll know if the motor is up to snuff. Maybe the flash is making the bike run too rich up top since it wasn't actually tuned specifically for your bike.
Yamaha R7 top speed
Hey guys, hope all of you are doing good! I have owned my R7 for a little bit over a month now and am just about to hit the 600 mile break in period, but I am really curious about the top speed on this bike, I’ve read that the top speed should be around 139mph, however even after installing a full exhaust system and getting the ECU flashed i can not get this bike to go over like 125, I know that I don’t really need the speed but I’m just curious to know why I can’t get it to top speed, I mean my little ninja 400 got to 120mph pretty easily and I shouldn’t have even “upgraded” if my 700cc is gonna be same top end as a N400
1 - 9 of 9 Posts
A few weeks ago at Daytona I managed to get up to 157mph according to the GPS lap timer.
full disclosure, this is a fully built bike for MotoAmerica Twins Cup and that was with a killer draft. Another R7 got an incredible draft and hit 159.
Still pretty wild to see speeds that high on the R7
full disclosure, this is a fully built bike for MotoAmerica Twins Cup and that was with a killer draft. Another R7 got an incredible draft and hit 159.
Still pretty wild to see speeds that high on the R7
Welcome to the forum!A few weeks ago at Daytona I managed to get up to 157mph according to the GPS lap timer.
full disclosure, this is a fully built bike for MotoAmerica Twins Cup and that was with a killer draft. Another R7 got an incredible draft and hit 159.
Still pretty wild to see speeds that high on the R7
That's impressive. On my Duc I've only seen 158ish and I'm sure that's not accurate haha. Surprising the R7 has the oopmh!
It's big competition is the Aprilia 660, those bikes need to be built to go that fast.
How much more (then the advertised 139mph) top speed would an exhaust, air intake, flashtune, and sprocket change add? What’s the best sprocket size to get the most reliable top speed?
I was surprised too see the speeds that high for the R7. I know for the Twins Cup the bikes are limited to 100 HP. AND for the Jr Cup the bikes are limited to 45 HP.A few weeks ago at Daytona I managed to get up to 157mph according to the GPS lap timer.
full disclosure, this is a fully built bike for MotoAmerica Twins Cup and that was with a killer draft. Another R7 got an incredible draft and hit 159.
Still pretty wild to see speeds that high on the R7
I have had my N400 a little over 120mph a few times on the street and track. My 400 has a full exhausT, aftermarket air filter, custom dyno tune and ECU flash.
You can get a bit more power with internal changes, I do not know the rules for twins cup concerning that though. SpeedDemon Motorcycles got an extra 20HP out of an FZ07 motor said the owner, and that was a couple years ago. Now you are talking bigger dollars though. The owner raced some twins cup races last year, otherwise he does track days out west here. Robem, in documenting the building of his wife's bike had Cometic make a new thinner head gasket which raised compression by about a half pound or so (I do not recall the exact amount), but all that little stuff helps and adds up, without greatly affecting reliability.I was surprised too see the speeds that high for the R7. I know for the Twins Cup the bikes are limited to 100 HP. AND for the Jr Cup the bikes are limited to 45 HP.
I have had my N400 a little over 120mph a few times on the street and track. My 400 has a full exhausT, aftermarket air filter, custom dyno tune and ECU flash.
There are no MA-imposed HP limits in Twins Cup. I have a mild-build superbike motor in my MT07 that dynoed at 92 hp (SAE corrected at KWS) with 100 oct gas and 10,400 rev limit. Bigger cams, higher compression pistons, and more revs should readily yield over 100hp. Downside? The high HP motors need to be torn down every other race weekend. I know from personal experience at Daytona that 100hp will get you 150mph without a draft, so mid 150s with draft makes sense for the front runners.I was surprised too see the speeds that high for the R7. I know for the Twins Cup the bikes are limited to 100 HP. AND for the Jr Cup the bikes are limited to 45 HP.
I have had my N400 a little over 120mph a few times on the street and track. My 400 has a full exhausT, aftermarket air filter, custom dyno tune and ECU flash.
1 - 9 of 9 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Yamaha YZF-R7 Forum
R7Forums.com is a forum community dedicated to Yamaha YZF-R7 owners and enthusiasts. Come join the discussion about the 2022+ Yamaha YZF-R7 sports bike!
Full Forum Listing
Recommended Communities
