pfenlon Posted October 1, 2023 Report Share Posted October 1, 2023 My 250 will not run properly under load, Carb mixture and timing is OK No electrical problems evident, coil change tried, newly built engine so I am thinking the cam is incorrect. How can I identify the cam in my car when I remove it please. Running twin HS6 carbs, electric Facet fuel pump, struggling here! Quote Link to post Share on other sites
ntc Posted October 1, 2023 Report Share Posted October 1, 2023 First giveaway is single cam chain Quote Link to post Share on other sites
elclem1 Posted October 1, 2023 Report Share Posted October 1, 2023 Dizzy 180 degrees out? Quote Link to post Share on other sites
BlueTR3A-5EKT Posted October 2, 2023 Report Share Posted October 2, 2023 How was the cam timed when the engine was restored? Quote Link to post Share on other sites
Malbaby Posted October 7, 2023 Report Share Posted October 7, 2023 (edited) Very unlikely to be the incorrect camshaft...As "Peter" suggested, the valve timing on the cam is possibly incorrect. Who did the engine restoration?. Edited October 7, 2023 by Malbaby Quote Link to post Share on other sites
BlueTR3A-5EKT Posted October 8, 2023 Report Share Posted October 8, 2023 On 10/1/2023 at 7:50 PM, pfenlon said: My 250 will not run properly under load, Carb mixture and timing is OK No electrical problems evident, coil change tried, newly built engine so I am thinking the cam is incorrect. How can I identify the cam in my car when I remove it please. Running twin HS6 carbs, electric Facet fuel pump, struggling here! Where did the twin SU HS6 come from? Are they jetted, needled and damper spring (ed) for the 2500 cc Triumph engine? Quote Link to post Share on other sites
Rob Salisbury Posted October 8, 2023 Report Share Posted October 8, 2023 Hi Pete, In answer to you question about identifying cams, everything you ever wanted to know about 6 pot cams is on a download chart from Chris Witor the Triumph 2000/2.5 specialist. Cheers Rob Quote Link to post Share on other sites
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