diff --git a/src/k_kart.c b/src/k_kart.c
index d6f678527..50e94d298 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -2131,7 +2131,7 @@ static void K_GetKartBoostPower(player_t *player)
 
 	if (player->kartstuff[k_startboost]) // Startup Boost
 	{
-		ADDBOOST(FRACUNIT/4, 6*FRACUNIT); // + 25% top speed, + 600% acceleration
+		ADDBOOST(FRACUNIT/3, 4*FRACUNIT); // + 33% top speed, + 400% acceleration
 	}
 
 	if (player->kartstuff[k_driftboost]) // Drift Boost
diff --git a/src/p_spec.c b/src/p_spec.c
index ea96ab268..315e04aa5 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -2197,7 +2197,7 @@ static void K_HandleLapIncrement(player_t *player)
 		else if (rainbowstartavailable == true)
 		{
 			S_StartSound(player->mo, sfx_s23c);
-			player->kartstuff[k_driftboost] = 125;
+			player->kartstuff[k_startboost] = 125;
 			K_SpawnDriftBoostExplosion(player, 3);
 			rainbowstartavailable = false;
 		}