Model 97 Mods - Carburation
Posted: Mon Mar 30, 2015 6:29 am
Has anyone ever tried running a 28 Mikuni on a 97 top end? I was wondering if it might mitigate bogging tendencies at lower revs. I have an entire assembly from GEM reed block out for the 28 Mikuni and was thinking of trying it just to see.
As it is, the engine runs great, but being a dedicated MX engine but with a wide ratio transmission installed, it tends to bog a bit if I let the revs drop. No surprise here. But I ran a Webco 125 kit on a 93 bottom end for two seasons of cross country racing with a 24 Mikuni, and though never a fast bike, it did better than well. Started 400th out of 450 in Kentucky in 1974 in a hare and hound, and finished 8th in a two hour race, so I know smaller carbs can work.
I was thinking that if this works, the 28 would be better suited to things like the Bad Rock ride, while the 32 would be best for scrambles tracks or moto.
Anyone have first hand on this with the 97? Porting is stock, but stock exhaust is a bit drastic as built. I know I can't really change that, but thinking I might get by with the carb swap.
As it is, the engine runs great, but being a dedicated MX engine but with a wide ratio transmission installed, it tends to bog a bit if I let the revs drop. No surprise here. But I ran a Webco 125 kit on a 93 bottom end for two seasons of cross country racing with a 24 Mikuni, and though never a fast bike, it did better than well. Started 400th out of 450 in Kentucky in 1974 in a hare and hound, and finished 8th in a two hour race, so I know smaller carbs can work.
I was thinking that if this works, the 28 would be better suited to things like the Bad Rock ride, while the 32 would be best for scrambles tracks or moto.
Anyone have first hand on this with the 97? Porting is stock, but stock exhaust is a bit drastic as built. I know I can't really change that, but thinking I might get by with the carb swap.