| Author | Message | ||
     Rick_a |
I'm rebuilding my motor. This is the last decision I have left to make and I'm having a hard time with it. The heart says Mikuni but the brain says Keihin. Who has experience with 'em both and how do they compare on the dyno? | ||
| Krassh |
I have a Mikuni 42 on my Electra Glide and I would never put anything else on a bike with a carburetor. Also you can go with a 45 Mikuni as well. I also did the higher compression pistons, stage two heads, roller rockers, lifters and Dyna 2000 Ignition but have not had a chance to dyno it yet. | ||
| Oz666 |
You are trading throttle response (and maybe a wee bit of horsepower) for much less tolerance of changing conditions. The Mikuni A/F ratio is fixed. The Keihan, at least through the midrange, will adapt to the air density available and keep the A/F closer to what you would like. At WOT both are still a direct function of throat/main jet. Soooooo, where do you want to ride?   Oz ^^^^^^^^^^^^^ just went from sea level to > 6200' w/NO problems.... (sort-of-stock Keihan) | ||
| Rick_a |
On the other hand the Mikuni is more tuneable and the jets are easier to access. CV's are fairly responsive...if you're ham-fisted with the throttle. | ||
| Rick_a |
I've been looking at the newer Edelbrock carbs. Hard to find any real info on 'em. They have a lot of features I like and I'm pretty much sold on the concept. It's like an updated Lectron. Buell used them on some California S2's so they can't be all bad. | ||
| Kenb |
price was my decision on the hsr42. wanted to go edelbrock or s&s but 200$ nib on ebay couldn't be beat. response on the hsr42 is night and day compared to the keihin cv40 | ||
| Kevyn |
Would I put a Keihn back on my S2 after using the Mikuni...no. I didn't dyno for HP/torque, just the A/F ratio and it was right on target in low-mid 13's. For around town, highway droning and running around in the hills it is perfect. | ||
| Rick_a |
I like that the Mikuni has a roller bearing slide. The Edelbrock slide slides on a hard anodized surface only. I've heard that these types of carbs have a real heavy pull to pop 'em back open after rolling the throttle closed at high rpm. | ||
| Rick_a |
Thanks for the input. I've the Mikuni on order. |
